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}, "value": 336000000, "unit": "people", "tolerance": 50000000, "uid": "aimo8512b6nh" }, { "id": "pp-india", "shape": "numeric", "tags": [ "population", "country" ], "prompt": { "modality": "text", "value": "Population of India, the most populous country" }, "value": 1430000000, "unit": "people", "tolerance": 210000000, "uid": "yddc5z9m00sv" }, { "id": "pp-china", "shape": "numeric", "tags": [ "population", "country" ], "prompt": { "modality": "text", "value": "Population of China" }, "value": 1410000000, "unit": "people", "tolerance": 210000000, "uid": "88n4bso75p34" }, { "id": "sp-earthmoon", "shape": "numeric", "tags": [ "space", "distance" ], "prompt": { "modality": "text", "value": "Distance from the Earth to the Moon" }, "value": 238855, "unit": "miles", "tolerance": 36000, "uid": "1rwspbwjpuck2" }, { "id": "sp-au", "shape": "numeric", "tags": [ "space", "distance" ], "prompt": { "modality": "text", "value": "Distance from the Earth to the Sun (one astronomical unit)" }, "value": 93000000, "unit": "miles", "tolerance": 14000000, "uid": "1yi54g11jh2i7f" }, { "id": "sp-lightyear", "shape": "numeric", "tags": [ "space", "light" ], "prompt": { "modality": "text", "value": "Distance light travels in one year" }, "value": 5880000000000, "unit": "miles", "tolerance": 880000000000, "uid": "jf1kbbw1k1xn" }, { "id": "sp-mars", "shape": "numeric", "tags": [ "space", "planets" ], "prompt": { "modality": "text", "value": "Closest approach distance from Earth to Mars" }, "value": 34000000, "unit": "miles", "tolerance": 5100000, "illustration": { "imagePrompt": "Photograph of the red planet Mars against the black of space", "imageSearchTerm": "Mars planet red", "alt": "The planet Mars", "credit": "Pexels · Zelch Csaba", "creditUrl": "https://www.flickr.com/photos/144614754@N02/45924475844", "url": "https://cdn.recurxive.com/packs/world-numbers/sp-mars.jpg" }, "uid": "ucqhrf1977ot5" }, { "id": "sp-iss", "shape": "numeric", "tags": [ "space", "spaceflight" ], "prompt": { "modality": "text", "value": "Typical altitude of the International Space Station" }, "value": 250, "unit": "miles", "tolerance": 38, "illustration": { "imagePrompt": "Photograph of the International Space Station orbiting above the curve of the blue Earth, solar panels catching sunlight, black space beyond", "imageSearchTerm": "International Space Station orbit", "alt": "The ISS orbiting above Earth", "credit": "Pexels · SpaceX", "creditUrl": "https://www.pexels.com/photo/close-up-dark-focus-horizon-23779/", "url": "https://cdn.recurxive.com/packs/world-numbers/sp-iss.jpg" }, "uid": "clqtg3k0filh" }, { "id": "sp-earthdia", "shape": "numeric", "tags": [ "space", "earth" ], "prompt": { "modality": "text", "value": "Diameter of the Earth" }, "value": 7918, "unit": "miles", "tolerance": 1200, "illustration": { "imagePrompt": "Photograph of planet Earth seen from space, blue oceans and swirling white clouds against the black of space, photorealistic NASA-style", "imageSearchTerm": "Earth from space planet", "alt": "Planet Earth seen from space", "credit": "Pexels · Zelch Csaba", "creditUrl": "https://www.flickr.com/photos/53460575@N03/7187190855", "url": "https://cdn.recurxive.com/packs/world-numbers/sp-earthdia.jpg" }, "uid": "14txuoidwdx3g" }, { "id": "sp-lightspeed", "shape": "numeric", "tags": [ "space", "constants" ], "prompt": { "modality": "text", "value": "Speed of light in a vacuum" }, "value": 186000, "unit": "miles per second", "tolerance": 28000, "uid": "l4air51e7ooop" }, { "id": "sp-sundia", "shape": "numeric", "tags": [ "space", "star" ], "prompt": { "modality": "text", "value": "Diameter of the Sun" }, "value": 864000, "unit": "miles", "tolerance": 130000, "uid": "1usc9qjzm1rqz" }, { "id": "sp-jupiter", "shape": "numeric", "tags": [ "space", "planets" ], "prompt": { "modality": "text", "value": "Diameter of Jupiter, the largest planet" }, "value": 86900, "unit": "miles", "tolerance": 13000, "illustration": { "imagePrompt": "Photograph of the planet 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}, "value": 8, "unit": "count", "tolerance": 0, "uid": "18pdf9s1xg0pow" }, { "id": "mo-debt", "shape": "numeric", "tags": [ "money", "usa" ], "prompt": { "modality": "text", "value": "US national debt (as of mid-2026)" }, "value": 38900000000000, "unit": "dollars", "tolerance": 5800000000000, "illustration": { "imagePrompt": "Photograph of many fanned-out US one hundred dollar bills filling the frame, money and finance theme, crisp detail", "imageSearchTerm": "US dollars cash money", "alt": "Fanned-out US hundred-dollar bills", "url": "https://cdn.recurxive.com/packs/world-numbers/mo-debt.jpg", "credit": "Openverse · 401(K) 2013 · CC BY-SA 2.0", "creditUrl": "https://www.flickr.com/photos/68751915@N05/6355261479" }, "uid": "f7yu1j1ezxo23" }, { "id": "mo-usgdp", "shape": "numeric", "tags": [ "money", "usa" ], "prompt": { "modality": "text", "value": "US annual GDP (2025)" }, "value": 30800000000000, "unit": "dollars", "tolerance": 4600000000000, "uid": "18okqlcpfi1go" }, { "id": "mo-worldgdp", "shape": "numeric", "tags": [ "money", "world" ], "prompt": { "modality": "text", "value": "World GDP (2025)" }, "value": 110000000000000, "unit": "dollars", "tolerance": 16000000000000, "uid": "15hi381207g6q" }, { "id": "mo-budget", "shape": "numeric", "tags": [ "money", "usa" ], "prompt": { "modality": "text", "value": "US federal budget outlays (2025)" }, "value": 6400000000000, "unit": "dollars", "tolerance": 960000000000, "uid": "18tbvww1j57h8m" }, { "id": "mo-nvidia", "shape": "numeric", "tags": [ "money", "markets" ], "prompt": { "modality": "text", "value": "Market value of Nvidia, the most valuable public company (2026)" }, "value": 5200000000000, "unit": "dollars", "tolerance": 780000000000, "uid": "13hnfvu109a5za" }, { "id": "mo-richest", "shape": "numeric", "tags": [ "money", "wealth" ], "prompt": { "modality": "text", "value": "Net worth of the world's richest person, Elon Musk (2026)" }, "value": 800000000000, "unit": "dollars", "tolerance": 120000000000, "uid": "dqf96c1ddmp8y" }, { "id": "mo-home", "shape": "numeric", "tags": [ "money", "housing" ], "prompt": { "modality": "text", "value": "Median price of an existing US home (2026)" }, "value": 407600, "unit": "dollars", "tolerance": 61000, "uid": "11irvom1pf3hve" }, { "id": "mo-carrier", "shape": "numeric", "tags": [ "money", "military" ], "prompt": { "modality": "text", "value": "Cost of a Gerald R. 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0, "uid": "1a0gkkpr2cbin" }, { "id": "us-house", "shape": "numeric", "tags": [ "usa", "congress" ], "prompt": { "modality": "text", "value": "Number of voting members in the US House" }, "value": 435, "unit": "count", "tolerance": 0, "uid": "1o6l0th107lih9" }, { "id": "us-electoral", "shape": "numeric", "tags": [ "usa", "elections" ], "prompt": { "modality": "text", "value": "Electoral votes needed to win the presidency" }, "value": 270, "unit": "count", "tolerance": 0, "uid": "1r43t218hyu9p" }, { "id": "us-term", "shape": "numeric", "tags": [ "usa", "presidency" ], "prompt": { "modality": "text", "value": "Years in a single US presidential term" }, "value": 4, "unit": "years", "tolerance": 0, "uid": "4t3f08uoujva" }, { "id": "us-constitution", "shape": "numeric", "tags": [ "usa", "history" ], "prompt": { "modality": "text", "value": "Age of the US Constitution in 2026 (ratified 1788)" }, "value": 238, "unit": "years", "tolerance": 0, "uid": "yx1nepmmi0j1" }, { "id": "us-amendments", "shape": "numeric", "tags": [ "usa", "history" ], "prompt": { "modality": "text", "value": "Number of amendments to the US Constitution" }, "value": 27, "unit": "count", "tolerance": 0, "uid": "rxnhrtuqdu0t" }, { "id": "us-states", "shape": "numeric", "tags": [ "usa", "states" ], "prompt": { "modality": "text", "value": "Number of US states" }, "value": 50, "unit": "count", "tolerance": 0, "uid": "dnubjuikgbo4" }, { "id": "us-parks", "shape": "numeric", "tags": [ "usa", "parks" ], "prompt": { "modality": "text", "value": "Number of US national parks (as of 2026)" }, "value": 63, "unit": "count", "tolerance": 1, "uid": "vuxtl56tscar" }, { "id": "us-stars", "shape": "numeric", "tags": [ "usa", "flag" ], "prompt": { "modality": "text", "value": "Number of stars on the US flag" }, "value": 50, "unit": "count", "tolerance": 0, "uid": "1m79nshd3nk3n" }, { "id": "us-stripes", "shape": "numeric", "tags": [ "usa", "flag" ], "prompt": { "modality": "text", "value": "Number of stripes on the US flag" }, "value": 13, "unit": "count", "tolerance": 0, "uid": "13wlyt71gmhnz5" }, { "id": "us-votingage", "shape": "numeric", "tags": [ "usa", "elections" ], "prompt": { "modality": "text", "value": "Voting age in the United States" }, "value": 18, "unit": "years", "tolerance": 0, "uid": "1cuorw6ve875w" }, { "id": "us-presage", "shape": "numeric", "tags": [ "usa", "presidency" ], "prompt": { "modality": "text", "value": "Minimum age to be US president" }, "value": 35, "unit": "years", "tolerance": 0, "uid": "17x1c2foycb9l" }, { "id": "rc-bones", "shape": "numeric", "tags": [ "body", "anatomy" ], "prompt": { "modality": "text", "value": "Number of bones in an average adult human body" }, "value": 206, "unit": "count", "tolerance": 0, "uid": "ir85fg3kc73a" }, { "id": "rc-heartbeats", "shape": "numeric", "tags": [ "body", "heart" ], "prompt": { "modality": "text", "value": "Average human heartbeats per day" }, "value": 100000, "unit": "beats", "tolerance": 15000, "uid": "q5kr4e1tjrh76" }, { "id": "rc-cheetah", "shape": "numeric", "tags": [ "animals", "speed" ], "prompt": { "modality": "text", "value": "Top running speed of a cheetah, the fastest land animal" }, "value": 70, "unit": "miles per hour", "tolerance": 10, "illustration": { "imagePrompt": "Photograph of a cheetah sprinting across golden savanna grass at full stride, motion energy, African wildlife, sharp focus", "imageSearchTerm": "cheetah running savanna", "alt": "A cheetah sprinting across the savanna", "credit": "Pexels · Charl Durand", "creditUrl": "https://www.flickr.com/photos/35034345586@N01/360239503", "url": "https://cdn.recurxive.com/packs/world-numbers/rc-cheetah.jpg" }, "uid": "fwfolh1q0s8s7" }, { "id": "rc-whale", "shape": "numeric", "tags": [ "animals", "whale" ], "prompt": { "modality": "text", "value": "Maximum weight of a blue whale, the largest animal" }, "value": 200, "unit": "tons", "tolerance": 30, "uid": "10oh04fw2j5k" }, { "id": "rc-scuba", "shape": "numeric", "tags": [ "records", "diving" ], "prompt": { "modality": "text", "value": "Deepest scuba dive on record" }, "value": 1090, "unit": "feet", "tolerance": 160, "uid": "24kw2ipqnlks" }, { "id": "rc-freedive", "shape": "numeric", "tags": [ "records", "diving" ], "prompt": { "modality": "text", "value": "Deepest no-limits free dive on record" }, "value": 702, "unit": "feet", "tolerance": 110, "uid": "6a92br1l6xzxn" }, { "id": "rc-hottest", "shape": "numeric", "tags": [ "records", "weather" ], "prompt": { "modality": "text", "value": "Highest reliably recorded air temperature on Earth" }, "value": 134, "unit": "degrees Fahrenheit", "tolerance": 20, "uid": "fncn3e52igke" }, { "id": "rc-bolt", "shape": "numeric", "tags": [ "records", "sports" ], "prompt": { "modality": "text", "value": "Usain Bolt's peak speed during his 100 m world record" }, "value": 27.8, "unit": "miles per hour", "tolerance": 4.2, "uid": "5fan87651aep" }, { "id": "ft-magnitudes", "shape": "fact", "tags": [ "intro" ], "title": "A feel for big numbers", "body": "This pack is a tour of magnitudes — how tall, how far, how many, how much. The fun isn't memorizing every figure but building intuition: is a skyscraper closer to 500 or 5,000 feet? Is the US debt in the billions or trillions? Guess first, then see how close you land.", "illustration": { "imageSearchTerm": "scale comparison size chart", "imagePrompt": "A visual scale comparison showing small and vast objects side by side, like a person dwarfed by a giant numeral, illustrating a sense of magnitude.", "alt": "A feel for big numbers", "depictable": false, "credit": "PaleoNeolitic (Openverse) · by 4.0", "creditUrl": "https://commons.wikimedia.org/w/index.php?curid=158123371", "subject": "A clean size-comparison chart ('Phorusrhacidae size comparison') showing four extinct terror-bird species as colored silhouettes towering over a small gray human silhouette on a measured grid, with a named species legend — a clear, honest illustration of scale/magnitude comparison.", "url": "https://cdn.recurxive.com/packs/world-numbers/images/ft-magnitudes.webp" }, "factVariant": "image-heavy", "imageCaption": "This pack is a tour of magnitudes — how tall, how far, how many, how much.", "uid": "1u897btei1sej" }, { "id": "ft-tallest", "shape": "fact", "tags": [ "structures", "mountains" ], "title": "How tall is tall?", "body": "The tallest building, the Burj Khalifa at 2,717 feet, is still dwarfed by the tallest mountain: Everest rises 29,032 feet — more than ten Burj Khalifas stacked. Human structures are impressive, but nature wins the height contest by an order of magnitude.", "illustration": { "imageSearchTerm": "Burj Khalifa Mount Everest", "imagePrompt": "A split comparison image showing the Burj Khalifa skyscraper next to Mount Everest's snow-capped peak, both at dramatic scale.", "alt": "How tall is tall?", "depictable": true, "url": "https://cdn.recurxive.com/packs/world-numbers/ft-tallest.jpg", "credit": "Openverse · [-‿-] · CC BY-SA 2.0", "creditUrl": "https://www.flickr.com/photos/113270135@N04/36664466446" }, "curatedDistractors": [ "Shanghai Tower", "CN Tower", "One World Trade Center" ], "uid": "9x12j4sus4rm" }, { "id": "ft-cntower", "shape": "fact", "tags": [ "structures", "tower" ], "title": "The CN Tower's 32-year reign", "body": "The CN Tower in Toronto stood as the world's tallest free-standing structure for 32 years after its 1976 completion, at 1,815 feet — surpassed only when Dubai's Burj Khalifa rose in 2007.", "illustration": { "imageSearchTerm": "CN Tower's 32-year reign", "imagePrompt": "The CN Tower's 32-year reign. The CN Tower in Toronto stood as the world's tallest free-standing structure for 32 years after its 1976 completion, at 1,815 feet — surpassed only when Dubai's Burj Khalifa rose i", "alt": "The CN Tower's 32-year reign", "credit": "Pexels · apertur 2.8", "url": "https://cdn.recurxive.com/packs/world-numbers/ft-cntower.jpg", "creditUrl": "https://www.pexels.com/photo/fireworks-over-toronto-on-new-year-eve-15466727/" }, "factVariant": "image-heavy", "imageCaption": "32 years on top — at 1,815 ft the CN Tower reigned as tallest until Dubai dwarfed it.", "curatedDistractors": [ "Ostankino Tower", "Tokyo Tower", "Oriental Pearl Tower" ], "uid": "1jshzzlyxprul" }, { "id": "ft-pacific", "shape": "fact", "tags": [ "water", "ocean" ], "title": "Pacific, half of Earth's water", "body": "The Pacific Ocean is so vast — over 60 million square miles — that it holds more water than all of Earth's land above sea level combined, at an average depth of about 13,000 feet.", "illustration": { "imageSearchTerm": "Pacific Ocean aerial view", "imagePrompt": "A vast aerial view of the open Pacific Ocean stretching to the horizon, with no land in sight.", "alt": "The Pacific holds half of Earth's water", "depictable": true, "credit": "Library of Congress · Pacific Ocean and rocky California coast · No known restrictions (verify at source)", "creditUrl": "http://www.loc.gov/item/2011632016/", "subject": "A dramatic elevated view of the rugged Big Sur coastline in California at dusk, with cliffs, a coastal road, and the Pacific Ocean stretching out to the horizon under open sky.", "url": "https://cdn.recurxive.com/packs/world-numbers/images/ft-pacific.webp" }, "factVariant": "image-heavy", "imageCaption": "60 million square miles of ocean — more water than all of Earth's land above the sea, combined.", "curatedDistractors": [ "Atlantic Ocean", "Indian Ocean", "Arctic Ocean" ], "uid": "134y7uybn6py4" }, { "id": "ft-route66", "shape": "fact", "tags": [ "distance", "roads" ], "title": "Route 66 crossed eight states", "body": "America's classic 'Mother Road,' Route 66, once stretched 2,448 miles from Chicago to Santa Monica, crossing eight states and helping launch modern road-trip culture before it was decommissioned in 1985.", "illustration": { "imageSearchTerm": "Route 66 highway sign", "imagePrompt": "A classic Route 66 road sign standing along a stretch of open American highway.", "alt": "Route 66 crossed eight states", "depictable": true, "url": "https://cdn.recurxive.com/packs/world-numbers/ft-route66.jpg", "credit": "Openverse · Ken Lund · CC BY-SA 2.0", "creditUrl": "https://www.flickr.com/photos/75683070@N00/3227811076" }, "factVariant": "image-heavy", "imageCaption": "2,448 miles, 8 states — the Mother Road ran Chicago to the Pacific before it vanished in 1985.", "curatedDistractors": [ "Lincoln Highway", "Dixie Highway", "Loneliest Road" ], "uid": "b1d00m3trutu" }, { "id": "ft-india-europe", "shape": "fact", "tags": [ "population", "country" ], "title": "India outnumbers all of Europe", "body": "India's population, around 1.43 billion, exceeds the entire population of Europe — about 745 million — by hundreds of millions, packed into a land area a fraction of Europe's size.", "illustration": { "imageSearchTerm": "crowded India street scene", "imagePrompt": "A bustling, densely crowded street market scene in India, filled with people, representing population scale.", "alt": "India outnumbers all of Europe", "depictable": true, "credit": "mckaysavage (Openverse) · by 2.0", "creditUrl": "https://www.flickr.com/photos/56796376@N00/3059483658", "subject": "A densely packed crowd of pedestrians filling a narrow shopping street in Chennai's T. Nagar market, India, with clothing stalls and shop signage lining both sides.", "url": "https://cdn.recurxive.com/packs/world-numbers/images/ft-india-europe.webp" }, "factVariant": "image-heavy", "imageCaption": "1.43 billion people — India alone outnumbers all of Europe by hundreds of millions.", "uid": "1sus0rv1fvvvex" }, { "id": "ft-iss", "shape": "fact", "tags": [ "space", "spaceflight" ], "title": "A sunrise every 45 minutes", "body": "Orbiting about 250 miles up at 17,500 mph, the International Space Station circles Earth roughly every 90 minutes — so its astronauts see a sunrise or sunset about every 45 minutes, around 16 of each per day.", "illustration": { "imageSearchTerm": "International Space Station orbit", "imagePrompt": "The International Space Station orbiting above Earth with a sunrise glowing along the planet's curved horizon.", "alt": "A sunrise every 45 minutes", "depictable": true, "credit": "NASA · Public domain", "creditUrl": "https://commons.wikimedia.org/wiki/File:STS-134_International_Space_Station_after_undocking.jpg", "subject": "The complete International Space Station with eight solar-array wings and radiators seen from above, backdropped by Earth's white clouds and blue ocean with the dark limb of space at top — NASA STS-134 flyaround photo", "url": "https://cdn.recurxive.com/packs/world-numbers/images/ft-iss.webp" }, "factVariant": "image-heavy", "imageCaption": "16 sunrises a day — the ISS laps the planet every 90 minutes at 17,500 mph.", "curatedDistractors": [ "Mir space station", "Skylab", "Hubble Space Telescope" ], "uid": "eow7rn1u10495" }, { "id": "ft-debt", "shape": "fact", "tags": [ "money", "usa" ], "title": "US debt tops the economy", "body": "By mid-2026 the US national debt had climbed to roughly $39 trillion — larger than the entire annual US economy, whose GDP is about $31 trillion. The debt grew by more than $2 trillion in a single year.", "illustration": { "imageSearchTerm": "stacked dollar bills", "imagePrompt": "A tall, precarious stack of US dollar bills or coins towering over a much smaller stack beside it, symbolizing debt outgrowing output, no text or numbers visible.", "alt": "US debt now tops the whole economy", "depictable": false, "credit": "Wikimedia Commons · CC BY-SA 3.0", "creditUrl": "https://commons.wikimedia.org/wiki/File:Stack_of_100_dollar_bills_(cropped).jpg", "subject": "A tall pyramid of banded $100-bill stacks (straps marked \"5,000\") piled on a table indoors — a real photograph, well composed, matches 'stacked dollar bills' directly.", "url": "https://cdn.recurxive.com/packs/world-numbers/images/ft-debt.webp" }, "factVariant": "image-heavy", "imageCaption": "$39 trillion in the hole — the US owes more than its entire economy makes in a year.", "uid": "1w0zvfjv8c3od" }, { "id": "ft-house", "shape": "fact", "tags": [ "usa", "congress" ], "title": "435 seats, fixed since 1911", "body": "The US House of Representatives has had 435 voting members since a 1911 law capped the number — even though the country's population has more than tripled since then, so each member now represents far more people.", "illustration": { "imageSearchTerm": "US House of Representatives chamber", "imagePrompt": "The US House of Representatives chamber in the Capitol, rows of wooden desks and seats facing the raised Speaker's dais.", "alt": "Seal of the U.S. House of Representatives", "depictable": true, "url": "https://cdn.recurxive.com/packs/world-numbers/ft-house.jpg", "credit": "Pexels · Radik 2707", "creditUrl": "https://www.pexels.com/photo/blue-seats-on-a-stadium-12041962/" }, "uid": "l8emda779ypq" }, { "id": "ft-heart", "shape": "fact", "tags": [ "body", "heart" ], "title": "Three billion beats a lifetime", "body": "At about 100,000 beats per day, a typical human heart beats close to 3 billion times over an 80-year life — without a single scheduled maintenance break.", "illustration": { "imageSearchTerm": "human heart anatomical model", "imagePrompt": "A detailed anatomical model of a human heart, deep red and muscular, showing its chambers and major vessels.", "alt": "Three billion beats a lifetime", "depictable": true, "url": "https://cdn.recurxive.com/packs/world-numbers/ft-heart.jpg", "credit": "Pexels · Egor Komarov", "creditUrl": "https://www.pexels.com/photo/white-vintage-device-with-buttons-17402633/" }, "uid": "1d35lze9kff1o" }, { "id": "mc-tallest", "shape": "mcq", "tags": [ "structures" ], "prompt": { "modality": "text", "value": "Which of these is the tallest?" }, "options": [ { "modality": "text", "value": "One World Trade Center" }, { "modality": "text", "value": "Empire State Building" }, { "modality": "text", "value": "Burj Khalifa" }, { "modality": "text", "value": "Eiffel Tower" } ], "correctIndex": 2, "explanation": "The Burj Khalifa (2,717 ft) is more than double One WTC and over three times the Eiffel Tower.", "uid": "cscyp7l2h9mh" }, { "id": "mc-bigcity", "shape": "mcq", "tags": [ "population", "city" ], "prompt": { "modality": "text", "value": "Which metro area has the most people?" }, "options": [ { "modality": "text", "value": "São Paulo" }, { "modality": "text", "value": "Mumbai" }, { "modality": "text", "value": "Tokyo" }, { "modality": "text", "value": "Cairo" } ], "correctIndex": 2, "explanation": "Greater Tokyo, at about 37 million, is the most populous metro area on Earth.", "uid": "1vypx5q1mhipg4" }, { "id": "pr-tallest-mtn", "shape": "pair", "tags": [ "recall" ], "sideA": { "modality": "text", "value": "Tallest mountain on Earth" }, "sideB": { "modality": "text", "value": "Mount Everest — 29,032 ft" }, "uid": "194nih21bj005i" }, { "id": "pr-longest-river", "shape": "pair", "tags": [ "recall" ], "sideA": { "modality": "text", "value": "Longest river" }, "sideB": { "modality": "text", "value": "the Nile — about 4,130 miles" }, "uid": "1s56d80lp3cv2" }, { "id": "pr-tallest-building", "shape": "pair", "tags": [ "recall" ], "sideA": { "modality": "text", "value": "Tallest building" }, "sideB": { "modality": "text", "value": "the Burj Khalifa — 2,717 ft" }, "uid": "1vibpsc1twdhha" }, { "id": "pr-deepest-ocean", "shape": "pair", "tags": [ "recall" ], "sideA": { "modality": "text", "value": "Deepest point in the ocean" }, "sideB": { "modality": "text", "value": "the Mariana Trench — about 35,900 ft" }, "uid": "1kxwii61at0xw6" }, { "id": "pr-largest-country", "shape": "pair", "tags": [ "recall" ], "sideA": { "modality": "text", "value": "Largest country by area" }, "sideB": { "modality": "text", "value": "Russia — about 6.6 million sq mi" }, "uid": "pt6b9s12ntm4m" }, { "id": "pr-most-populous", "shape": "pair", "tags": [ "recall" ], "sideA": { "modality": "text", "value": "Most populous country" }, "sideB": { "modality": "text", "value": "India — about 1.43 billion people" }, "uid": "13ioyo81nkvips" }, { "id": "pr-closest-star", "shape": "pair", "tags": [ "recall" ], "sideA": { "modality": "text", "value": "Closest star to Earth" }, "sideB": { "modality": "text", "value": "the Sun — about 93 million miles away" }, "uid": "1mcaoau1oqcusu" }, { "id": "pr-fastest-animal", "shape": "pair", "tags": [ "recall" ], "sideA": { "modality": "text", "value": "Fastest land animal" }, "sideB": { "modality": "text", "value": "the cheetah — about 70 mph" }, "uid": "f9k2s71p86ctr" }, { "id": "pr-most-valuable-co", "shape": "pair", "tags": [ "recall" ], "sideA": { "modality": "text", "value": "Most valuable public company" }, "sideB": { "modality": "text", "value": "Nvidia — about $5 trillion" }, "uid": "1xs7yq31dznaf1" }, { "id": "pr-presidents", "shape": "pair", "tags": [ "recall" ], "sideA": { "modality": "text", "value": "US presidents through 2026" }, "sideB": { "modality": "text", "value": "47 — Trump is the 47th" }, "uid": "wxhqo32azvdp" }, { "id": "concept-mount-everest", "shape": "concept", "tags": [ "key-concept", "place" ], "conceptKind": "place", "name": "Mount Everest", "clues": [ "This peak is the tallest mountain on Earth.", "Located in the Himalayas, it attracts climbers from around the world.", "Its height is approximately 29,032 feet above sea level." ], "uid": "xljgr0stbxj6" }, { "id": "concept-k2", "shape": "concept", "tags": [ "key-concept", "place" ], "conceptKind": "place", "name": "K2", "clues": [ "Known as the second-highest mountain in the world.", "This peak is part of the Karakoram range in Pakistan and China.", "It stands at about 28,251 feet tall." ], "uid": "ob4isz13qcmab" }, { "id": "concept-aconcagua", "shape": "concept", "tags": [ "key-concept", "place" ], "conceptKind": "place", "name": "Aconcagua", "clues": [ "This is the highest peak in South America.", "Located in the Andes mountain range, it is a popular climbing destination.", "Its height reaches approximately 22,831 feet." ], "uid": "u15pn1nbawdz" }, { "id": "concept-denali", "shape": "concept", "tags": [ "key-concept", "place" ], "conceptKind": "place", "name": "Denali", "clues": [ "This mountain is the highest in North America.", "It is located in Alaska and was formerly known as Mount McKinley.", "Its elevation is about 20,310 feet." ], "uid": "p3mrzx11wgqhz" }, { "id": "concept-mount-kilimanjaro", "shape": "concept", "tags": [ "key-concept", "place" ], "conceptKind": "place", "name": "Mount Kilimanjaro", "clues": [ "This is the highest mountain in Africa.", "Located in Tanzania, it is a popular trekking destination.", "It stands at approximately 19,341 feet tall." ], "uid": "10g9mmgbqkjrw" }, { "id": "concept-mont-blanc", "shape": "concept", "tags": [ "key-concept", "place" ], "conceptKind": "place", "name": "Mont Blanc", "clues": [ "This peak is the highest in the Alps.", "It is located on the border between France and Italy.", "Its elevation is about 15,777 feet." ], "uid": "k6gzxq14o5v6w" }, { "id": "concept-burj-khalifa", "shape": "concept", "tags": [ "key-concept", "thing" ], "conceptKind": "thing", "name": "Burj Khalifa", "clues": [ "This structure is known as the tallest building in the world.", "It reaches a height of 2,717 feet.", "Located in Dubai, it was completed in 2010." ], "uid": "1s2qpdk5ddm1w" }, { "id": "concept-shanghai-tower", "shape": "concept", "tags": [ "key-concept", "thing" ], "conceptKind": "thing", "name": "Shanghai Tower", "clues": [ "This building is one of the tallest skyscrapers globally.", "It has a height of 2,073 feet.", "Located in China, it features a unique twisting design." ], "uid": "1fiiifo1xes4n8" }, { "id": "concept-one-world-trade-center", "shape": "concept", "tags": [ "key-concept", "thing" ], "conceptKind": "thing", "name": "One World Trade Center", "clues": [ "This building is a prominent feature of the New York City skyline.", "It stands at 1,776 feet tall.", "It was built as a symbol of resilience after the September 11 attacks." ], "uid": "10hk6my1uszpn8" }, { "id": "concept-cn-tower", "shape": "concept", "tags": [ "key-concept", "thing" ], "conceptKind": "thing", "name": "CN Tower", "clues": [ "This structure was once the tallest free-standing building in the world.", "It reaches a height of 1,815 feet.", "Located in Toronto, it features a revolving restaurant." ], "uid": "wnq04ylsuv8k" }, { "id": "concept-empire-state-building", "shape": "concept", "tags": [ "key-concept", "thing" ], "conceptKind": "thing", "name": "Empire State Building", "clues": [ "This iconic skyscraper is located in New York City.", "It has a height of 1,250 feet to its roof.", "It was completed in 1931 and is a symbol of American architecture." ], "uid": "19npqyb1vbc00p" }, { "id": "concept-eiffel-tower", "shape": "concept", "tags": [ "key-concept", "thing" ], "conceptKind": "thing", "name": "Eiffel Tower", "clues": [ "This iron lattice tower is a global cultural icon of France.", "It stands at a height of 1,083 feet.", "Located in Paris, it was completed in 1889 for the World's Fair." ], "uid": "1s2eb1e14xekke" }, { "id": "def-elevation", "shape": "definition", "tags": [ "mountains", "earth" ], "term": { "modality": "text", "value": "Elevation" }, "definition": { "modality": "text", "value": "Elevation is the height of a point above sea level, usually given in metres or feet. Mount Everest's elevation of 8,849 metres makes it the highest point on Earth." }, "curatedDistractors": [ "Latitude", "Wingspan", "Magnitude" ], "uid": "1pdk5eo1uykk7w" }, { "id": "def-light-year", "shape": "definition", "tags": [ "cosmology", "distance" ], "term": { "modality": "text", "value": "Light-year" }, "definition": { "modality": "text", "value": "A light-year is the distance light travels in one year, about 9.46 trillion kilometres. Proxima Centauri, the nearest star beyond the Sun, lies roughly four light-years away." }, "curatedDistractors": [ "Parsec", "Astronomical unit", "Nautical mile" ], "uid": "uz93wmhov4ai" }, { "id": "def-population", "shape": "definition", "tags": [ "population", "countries" ], "term": { "modality": "text", "value": "Population" }, "definition": { "modality": "text", "value": "Population is the total number of people living in a place. India recently overtook China as the most populous country, each with a population above 1.4 billion." }, "curatedDistractors": [ "Density", "GDP", "Birth rate" ], "uid": "1eqvkme14mcgks" }, { "id": "def-gdp", "shape": "definition", "tags": [ "money", "markets" ], "term": { "modality": "text", "value": "GDP" }, "definition": { "modality": "text", "value": "GDP, or gross domestic product, is the total value of the goods and services a country produces in a year. The United States has the world's largest GDP, above 25 trillion dollars." }, "curatedDistractors": [ "GNP", "CPI", "GNI" ], "uid": "xpzzdmla4lko" }, { "id": "def-wingspan", "shape": "definition", "tags": [ "records", "animals" ], "term": { "modality": "text", "value": "Wingspan" }, "definition": { "modality": "text", "value": "Wingspan is the distance from one wingtip to the other. The wandering albatross has the largest wingspan of any living bird, stretching beyond three metres." }, "curatedDistractors": [ "Elevation", "Girth", "Wavelength" ], "uid": "1ubyymylp98r6" }, { "id": "def-magnitude", "shape": "definition", "tags": [ "cosmology", "constants" ], "term": { "modality": "text", "value": "Magnitude" }, "definition": { "modality": "text", "value": "Magnitude is a measure of size or brightness, often on a logarithmic scale. On the stellar magnitude scale a lower number means a brighter star, so a first-magnitude star outshines a sixth-magnitude one." }, "curatedDistractors": [ "Amplitude", "Frequency", "Parallax" ], "uid": "18byn2oi3zzbs" }, { "id": "scrapbook-world-numbers-1", "shape": "fact", "factVariant": "scrapbook", "title": "A Feel for Big Numbers", "body": "Exploring vast magnitudes in nature and society.", "tags": [ "scrapbook", "overview" ], "illustration": { "kind": "scrapbook", "alt": "Exploring vast magnitudes in nature and society.", "imagePrompt": "Create a scrapbook collage that showcases various big numbers in a playful way. Include a towering mountain illustration representing 29,029 feet for Everest, with arrows pointing to its peak labeled 'Everest Height.' Add whimsical doodles around the image, like clouds and birds, and include a cheerful sun in the corner. Use a warm color palette with torn-paper layers featuring stats like 'World Population: 8 Billion' and 'Longest River: 4,135 Miles - Amazon.' The hand-lettered title should be at the top, inviting viewers to explore.", "imageSearchTerm": "world-numbers scrapbook poster", "credit": "AI-generated (gpt-image-1)", "url": "https://cdn.recurxive.com/packs/world-numbers/generated/scrapbook-1.webp" }, "uid": "1mkfopk3i9i2g" }, { "id": "scrapbook-world-numbers-2", "shape": "fact", "factVariant": "scrapbook", "title": "Cosmic Distances Explained", "body": "Delving into the vastness of the universe with numbers.", "tags": [ "scrapbook", "overview" ], "illustration": { "kind": "scrapbook", "alt": "Delving into the vastness of the universe with numbers.", "imagePrompt": "Design a scrapbook poster that illustrates the concept of cosmic distances. The central image should be an imaginative depiction of the Milky Way, with a glowing star labeled 'Our Galaxy - 100,000 Light Years.' Surround it with doodled planets and constellations, each with hand-written labels like 'Closest Star: 4.24 Light Years - Proxima Centauri.' Use a palette of deep blues and purples, cutting out sections to reveal facts about space distances. The title 'Cosmic Distances Explained' should be prominently hand-lettered at the top with arrows guiding the eyes through the collage.", "imageSearchTerm": "world-numbers scrapbook poster", "credit": "AI-generated (gpt-image-1)", "url": "https://cdn.recurxive.com/packs/world-numbers/generated/scrapbook-2.webp" }, "uid": "1xfwk40ao4jye" }, { "id": "mcq-rw-l1-p2-monuments", "shape": "mcq", "tags": [ "monuments", "great-pyramid" ], "prompt": { "modality": "text", "value": "Which monument was the tallest structure on Earth for nearly 4,000 years?" }, "options": [ { "modality": "text", "value": "The Hoover Dam" }, { "modality": "text", "value": "The Gateway Arch" }, { "modality": "text", "value": "The Great Pyramid of Giza" }, { "modality": "text", "value": "The Washington Monument" } ], "correctIndex": 2, "explanation": "The Great Pyramid of Giza, originally 481 feet, held the record as Earth's tallest structure for nearly 4,000 years — a longevity no modern building has come close to matching.", "uid": "yl3f3l1uqp3ij" }, { "id": "mcq-rw-l1-p3-mountains", "shape": "mcq", "tags": [ "mountains", "mauna-kea" ], "prompt": { "modality": "text", "value": "Measured from its base on the ocean floor rather than from sea level, which mountain is actually taller than Mount Everest?" }, "options": [ { "modality": "text", "value": "Mauna Kea" }, { "modality": "text", "value": "Kilimanjaro" }, { "modality": "text", "value": "K2" }, { "modality": "text", "value": "Denali" } ], "correctIndex": 0, "explanation": "Mauna Kea rises only 13,803 feet above sea level, but from its base on the ocean floor it stands about 33,500 feet — taller than Everest. It simply hides most of its height underwater.", "uid": "243u29vum0fz" }, { "id": "mcq-rw-l2-p2-land", "shape": "mcq", "tags": [ "land", "russia" ], "prompt": { "modality": "text", "value": "Russia, the world's largest country at about 6.6 million square miles, is so vast that it spans how many time zones?" }, "options": [ { "modality": "text", "value": "Five" }, { "modality": "text", "value": "Eight" }, { "modality": "text", "value": "Fifteen" }, { "modality": "text", "value": "Eleven" } ], "correctIndex": 3, "explanation": "Russia's roughly 6.6 million square miles stretch across eleven time zones. For scale, even one US state — Alaska, at about 663,000 square miles — is larger than most countries.", "uid": "kx4ccatgydwg" }, { "id": "mcq-rw-l3-p2-nations", "shape": "mcq", "tags": [ "population", "world" ], "prompt": { "modality": "text", "value": "According to the guide, human population took all of prior history to reach its first billion around what year?" }, "options": [ { "modality": "text", "value": "1900" }, { "modality": "text", "value": "1804" }, { "modality": "text", "value": "1650" }, { "modality": "text", "value": "1927" } ], "correctIndex": 1, "explanation": "World population reached its first billion around 1804 after all of prior human history; it now adds another billion roughly every dozen years, standing near 8.1 billion today.", "uid": "1g4ihegalx0mc" }, { "id": "mcq-rw-l4-p1-distances", "shape": "mcq", "tags": [ "space", "moon" ], "prompt": { "modality": "text", "value": "About how long did the Apollo astronauts take to travel to the Moon, some 238,855 miles away?" }, "options": [ { "modality": "text", "value": "Three hours" }, { "modality": "text", "value": "Three days" }, { "modality": "text", "value": "Three weeks" }, { "modality": "text", "value": "Three months" } ], "correctIndex": 1, "explanation": "The Moon is about 238,855 miles away — far enough that Apollo astronauts needed three days to reach it, yet close enough that its reflected light returns to Earth in just over a second.", "uid": "1ebedze7srvh2" }, { "id": "mcq-rw-l6-p2-symbols", "shape": "mcq", "tags": [ "us-flag", "symbols" ], "prompt": { "modality": "text", "value": "What do the 13 stripes on the US flag represent?" }, "options": [ { "modality": "text", "value": "The thirteen signers of the Declaration of Independence" }, { "modality": "text", "value": "The original thirteen colonies" }, { "modality": "text", "value": "The first thirteen states to ratify the Constitution" }, { "modality": "text", "value": "The thirteen westernmost states" } ], "correctIndex": 1, "explanation": "The flag records the nation's growth in two layers: 50 stars for the current states, and 13 stripes — one for each original colony that declared independence. The stripes stayed fixed while the stars multiplied.", "uid": "9d21k6hebirs" }, { "id": "mcq-rw-l7-p1-records", "shape": "mcq", "tags": [ "human-body", "bones" ], "prompt": { "modality": "text", "value": "A human baby is born with roughly how many bones, which fuse over time down to the 206 of an adult?" }, "options": [ { "modality": "text", "value": "About 250" }, { "modality": "text", "value": "About 270" }, { "modality": "text", "value": "About 300" }, { "modality": "text", "value": "About 350" } ], "correctIndex": 2, "explanation": "A newborn has around 300 bones that gradually fuse, leaving the average adult with 206. Many separate infant bones — especially in the skull — knit together as the body grows.", "uid": "ym3evc1vdmj58" }, { "id": "mcq-rw-l8-p1-superlatives", "shape": "mcq", "tags": [ "superlatives", "extremes", "geography" ], "prompt": { "modality": "text", "value": "Comparing Earth's tallest mountain (Mount Everest) with the deepest ocean point (the Mariana Trench), which statement is true?" }, "options": [ { "modality": "text", "value": "The Mariana Trench is deeper than Mount Everest is tall", "short": "Trench deeper than Everest is tall" }, { "modality": "text", "value": "Mount Everest is more than twice as tall as the trench is deep", "short": "Everest over twice the trench depth" }, { "modality": "text", "value": "The two are almost exactly equal in magnitude", "short": "The two are almost exactly equal" }, { "modality": "text", "value": "Mount Everest is taller than the Mariana Trench is deep", "short": "Everest taller than Trench is deep" } ], "correctIndex": 0, "explanation": "Everest rises about 29,032 ft, but the Mariana Trench plunges to roughly 35,900 ft. So the ocean's deepest point is actually deeper than the highest mountain is tall.", "uid": "g5c7kk1uf1nm8" }, { "id": "mcq-rw-lc-places", "shape": "mcq", "tags": [ "mountains", "geography", "africa" ], "prompt": { "modality": "text", "value": "Which peak is the highest mountain in Africa?" }, "options": [ { "modality": "text", "value": "Mont Blanc" }, { "modality": "text", "value": "Aconcagua" }, { "modality": "text", "value": "Denali" }, { "modality": "text", "value": "Mount Kilimanjaro" } ], "correctIndex": 3, "explanation": "Mount Kilimanjaro in Tanzania (about 19,341 ft) is Africa's highest mountain. Denali is highest in North America, Aconcagua in South America, and Mont Blanc in the Alps.", "uid": "1fhpeoec3qtiq" }, { "id": "mcq-rw-lc-things", "shape": "mcq", "tags": [ "structures", "towers", "records" ], "prompt": { "modality": "text", "value": "Which structure was once the tallest free-standing building in the world?" }, "options": [ { "modality": "text", "value": "Oriental Pearl Tower" }, { "modality": "text", "value": "Tokyo Tower" }, { "modality": "text", "value": "Space Needle" }, { "modality": "text", "value": "CN Tower" } ], "correctIndex": 3, "explanation": "Toronto's CN Tower (1,815 ft, with a revolving restaurant) once held the record as the world's tallest free-standing structure. The Burj Khalifa is now the tallest building overall.", "uid": "o4uqkl0vnse" }, { "id": "cz-world-numbers-def-elevation", "shape": "cloze", "tags": [ "mountains", "earth" ], "template": "___ is the height of a point above sea level, usually given in metres or feet. Mount Everest's ___ of 8,849 metres makes it the highest point on Earth.", "answer": "Elevation", "distractors": [ "Latitude", "Wingspan", "Magnitude" ], "derivedFrom": "def-elevation", "explanation": "Compare: Wingspan — Wingspan is the distance from one wingtip to the other. The wandering albatross has the largest wingspan of any living bird, stretching beyond three metres.", "uid": "vaxzdk19iymtg" }, { "id": "cz-world-numbers-def-light-year", "shape": "cloze", "tags": [ "cosmology", "distance" ], "template": "A ___ is the distance light travels in one year, about 9.46 trillion kilometres. Proxima Centauri, the nearest star beyond the Sun, lies roughly four ___ away.", "answer": "Light-year", "distractors": [ "Parsec", "Astronomical unit", "Nautical mile" ], "derivedFrom": "def-light-year", "uid": "1oxg5f1yvbcsn" }, { "id": "cz-world-numbers-def-population", "shape": "cloze", "tags": [ "population", "countries" ], "template": "___ is the total number of people living in a place. India recently overtook China as the most populous country, each with a ___ above 1.4 billion.", "answer": "Population", "distractors": [ "Density", "GDP", "Birth rate" ], "derivedFrom": "def-population", "explanation": "Compare: GDP — GDP, or gross domestic product, is the total value of the goods and services a country produces in a year. The United States has the world's largest GDP, above 25 trillion dollars.", "uid": "1urpx5y1focqp4" }, { "id": "cz-world-numbers-def-gdp", "shape": "cloze", "tags": [ "money", "markets" ], "template": "___ is the total value of the goods and services a country produces in a year. The United States has the world's largest ___, above 25 trillion dollars.", "answer": "GDP", "distractors": [ "GNP", "CPI", "GNI" ], "derivedFrom": "def-gdp", "uid": "1qw3hfw10e6xo6" }, { "id": "cz-world-numbers-def-wingspan", "shape": "cloze", "tags": [ "records", "animals" ], "template": "___ is the distance from one wingtip to the other. The wandering albatross has the largest ___ of any living bird, stretching beyond three metres.", "answer": "Wingspan", "distractors": [ "Elevation", "Girth", "Wavelength" ], "derivedFrom": "def-wingspan", "explanation": "Compare: Elevation — Elevation is the height of a point above sea level, usually given in metres or feet. Mount Everest's elevation of 8,849 metres makes it the highest point on Earth.", "uid": "1bxx10w1lgrg4" }, { "id": "cz-world-numbers-def-magnitude", "shape": "cloze", "tags": [ "cosmology", "constants" ], "template": "___ is a measure of size or brightness, often on a logarithmic scale. On the stellar ___ scale a lower number means a brighter star, so a first-___ star outshines a sixth-___ one.", "answer": "Magnitude", "distractors": [ "Amplitude", "Frequency", "Parallax" ], "derivedFrom": "def-magnitude", "uid": "1h15smc19dmeus" }, { "id": "cz-world-numbers-ft-tallest", "shape": "cloze", "tags": [ "structures", "mountains" ], "template": "The tallest building, the ___ at 2,717 feet, is still dwarfed by the tallest mountain: Everest rises 29,032 feet — more than ten ___ stacked. Human structures are impressive, but nature wins the height contest by an order of magnitude.", "answer": "Burj Khalifa", "distractors": [ "Shanghai Tower", "CN Tower", "One World Trade Center" ], "derivedFrom": "ft-tallest", "explanation": "Compare: Shanghai Tower — This building is one of the tallest skyscrapers globally. CN Tower — This structure was once the tallest free-standing building in the world.", "uid": "33ez33v7bjrj" }, { "id": "cz-world-numbers-ft-cntower", "shape": "cloze", "tags": [ "structures", "tower" ], "template": "The ___ in Toronto stood as the world's tallest free-standing structure for 32 years after its 1976 completion, at 1,815 feet — surpassed only when Dubai's Burj Khalifa rose in 2007.", "answer": "CN Tower", "distractors": [ "Ostankino Tower", "Tokyo Tower", "Oriental Pearl Tower" ], "derivedFrom": "ft-cntower", "uid": "bvp4pfji502p" }, { "id": "mcq-c-world-numbers-ft-cntower", "shape": "mcq", "tags": [ "structures", "tower" ], "prompt": { "modality": "text", "value": "The ___ in Toronto stood as the world's tallest free-standing structure for 32 years after its 1976 completion, at 1,815 feet — surpassed only when Dubai's Burj Khalifa rose in 2007." }, "options": [ { "modality": "text", "value": "CN Tower" }, { "modality": "text", "value": "Ostankino Tower" }, { "modality": "text", "value": "Tokyo Tower" }, { "modality": "text", "value": "Oriental Pearl Tower" } ], "correctIndex": 0, "derivedFrom": "ft-cntower", "uid": "i5gbty1m6wun4" }, { "id": "cz-world-numbers-ft-pacific", "shape": "cloze", "tags": [ "water", "ocean" ], "template": "The ___ is so vast — over 60 million square miles — that it holds more water than all of Earth's land above sea level combined, at an average depth of about 13,000 feet.", "answer": "Pacific Ocean", "distractors": [ "Atlantic Ocean", "Indian Ocean", "Arctic Ocean" ], "derivedFrom": "ft-pacific", "uid": "llj3xf1qgvbhl" }, { "id": "mcq-c-world-numbers-ft-pacific", "shape": "mcq", "tags": [ "water", "ocean" ], "prompt": { "modality": "text", "value": "The ___ is so vast — over 60 million square miles — that it holds more water than all of Earth's land above sea level combined, at an average depth of about 13,000 feet." }, "options": [ { "modality": "text", "value": "Arctic Ocean" }, { "modality": "text", "value": "Indian Ocean" }, { "modality": "text", "value": "Pacific Ocean" }, { "modality": "text", "value": "Atlantic Ocean" } ], "correctIndex": 2, "derivedFrom": "ft-pacific", "uid": "9rp1wu1fzzseo" }, { "id": "cz-world-numbers-ft-route66", "shape": "cloze", "tags": [ "distance", "roads" ], "template": "America's classic '___,' Route 66, once stretched 2,448 miles from Chicago to Santa Monica, crossing eight states and helping launch modern road-trip culture before it was decommissioned in 1985.", "answer": "Mother Road", "distractors": [ "Lincoln Highway", "Dixie Highway", "Loneliest Road" ], "derivedFrom": "ft-route66", "uid": "7i8ncwhct0ug" }, { "id": "mcq-c-world-numbers-ft-route66", "shape": "mcq", "tags": [ "distance", "roads" ], "prompt": { "modality": "text", "value": "America's classic '___,' Route 66, once stretched 2,448 miles from Chicago to Santa Monica, crossing eight states and helping launch modern road-trip culture before it was decommissioned in 1985." }, "options": [ { "modality": "text", "value": "Dixie Highway" }, { "modality": "text", "value": "Lincoln Highway" }, { "modality": "text", "value": "Mother Road" }, { "modality": "text", "value": "Loneliest Road" } ], "correctIndex": 2, "derivedFrom": "ft-route66", "uid": "7y2iixdfn6hl" }, { "id": "cz-world-numbers-ft-iss", "shape": "cloze", "tags": [ "space", "spaceflight" ], "template": "Orbiting about 250 miles up at 17,500 mph, the ___ circles Earth roughly every 90 minutes — so its astronauts see a sunrise or sunset about every 45 minutes, around 16 of each per day.", "answer": "International Space Station", "distractors": [ "Mir space station", "Skylab", "Hubble Space Telescope" ], "derivedFrom": "ft-iss", "uid": "5g1xzha5nwi5" }, { "id": "mcq-c-world-numbers-ft-iss", "shape": "mcq", "tags": [ "space", "spaceflight" ], "prompt": { "modality": "text", "value": "Orbiting about 250 miles up at 17,500 mph, the ___ circles Earth roughly every 90 minutes — so its astronauts see a sunrise or sunset about every 45 minutes, around 16 of each per day." }, "options": [ { "modality": "text", "value": "International Space Station" }, { "modality": "text", "value": "Mir space station" }, { "modality": "text", "value": "Skylab" }, { "modality": "text", "value": "Hubble Space Telescope" } ], "correctIndex": 0, "derivedFrom": "ft-iss", "uid": "ognrkj15proyz" }, { "id": "cz-world-numbers-ft-debt", "shape": "cloze", "tags": [ "money", "usa" ], "template": "By mid-___ the US national debt had climbed to roughly $39 trillion — larger than the entire annual US economy, whose GDP is about $31 trillion. The debt grew by more than $2 trillion in a single year.", "answer": "2026", "distractors": [ "2019", "2035", "2002" ], "derivedFrom": "ft-debt", "uid": "1yz140idq0c0w" }, { "id": "mcq-c-world-numbers-ft-debt", "shape": "mcq", "tags": [ "money", "usa" ], "prompt": { "modality": "text", "value": "By mid-___ the US national debt had climbed to roughly $39 trillion — larger than the entire annual US economy, whose GDP is about $31 trillion. The debt grew by more than $2 trillion in a single year." }, "options": [ { "modality": "text", "value": "2026" }, { "modality": "text", "value": "2035" }, { "modality": "text", "value": "2002" }, { "modality": "text", "value": "2019" } ], "correctIndex": 0, "derivedFrom": "ft-debt", "uid": "1tsl9mmmaru0i" }, { "id": "cz-world-numbers-ft-house", "shape": "cloze", "tags": [ "usa", "congress" ], "template": "The US House of Representatives has had 435 voting members since a ___ law capped the number — even though the country's population has more than tripled since then, so each member now represents far more people.", "answer": "1911", "distractors": [ "1904", "1920", "1887" ], "derivedFrom": "ft-house", "uid": "gcklphvn083j" }, { "id": "mcq-c-world-numbers-ft-house", "shape": "mcq", "tags": [ "usa", "congress" ], "prompt": { "modality": "text", "value": "The US House of Representatives has had 435 voting members since a ___ law capped the number — even though the country's population has more than tripled since then, so each member now represents far more people." }, "options": [ { "modality": "text", "value": "1887" }, { "modality": "text", "value": "1920" }, { "modality": "text", "value": "1911" }, { "modality": "text", "value": "1904" } ], "correctIndex": 2, "derivedFrom": "ft-house", "uid": "18ary2510qyz29" }, { "id": "tf-d-world-numbers-def-elevation", "shape": "trueFalse", "tags": [ "mountains", "earth" ], "statement": "Elevation: The height of a point above sea level, usually given in metres or feet.", "isTrue": true, "why": "That definition is correct for \"Elevation\".", "derivedFrom": "def-elevation", "uid": "w4uhjz1wf3yjp" }, { "id": "tf-df-world-numbers-def-light-year", "shape": "trueFalse", "tags": [ "cosmology", "distance" ], "statement": "Magnitude: The distance light travels in one year, about 9.46 trillion kilometres.", "isTrue": false, "why": "That's the definition of \"Light-year\", not \"Magnitude\".", "derivedFrom": "def-light-year", "uid": "1m4ueu81bd9svu" }, { "id": "tf-d-world-numbers-def-population", "shape": "trueFalse", "tags": [ "population", "countries" ], "statement": "Population: The total number of people living in a place.", "isTrue": true, "why": "That definition is correct for \"Population\".", "derivedFrom": "def-population", "uid": "1iki1pxemr09h" }, { "id": "tf-d-world-numbers-def-gdp", "shape": "trueFalse", "tags": [ "money", "markets" ], "statement": "GDP: Or gross domestic product, is the total value of the goods and services a country produces in a year.", "isTrue": true, "why": "That definition is correct for \"GDP\".", "derivedFrom": "def-gdp", "uid": "djk1vfahgri5" }, { "id": "tf-d-world-numbers-def-wingspan", "shape": "trueFalse", "tags": [ "records", "animals" ], "statement": "Wingspan: The distance from one wingtip to the other.", "isTrue": true, "why": "That definition is correct for \"Wingspan\".", "derivedFrom": "def-wingspan", "uid": "cxudk57aj64h" }, { "id": "tf-df-world-numbers-def-magnitude", "shape": "trueFalse", "tags": [ "cosmology", "constants" ], "statement": "Light-year: A measure of size or brightness, often on a logarithmic scale.", "isTrue": false, "why": "That's the definition of \"Magnitude\", not \"Light-year\".", "derivedFrom": "def-magnitude", "uid": "zubbm31ytz6lb" }, { "id": "concept-rw-world-numbers-us-constitution", "shape": "concept", "conceptKind": "thing", "tags": [ "thing", "government", "usa" ], "name": "US Constitution", "clues": [ "The founding legal framework the entire US federal government is built on.", "At 238 years old in 2026, it is the oldest written national charter still in use.", "Ratified in 1788, it has been formally amended only 27 times." ], "uid": "1rem2jo1cxbysm" }, { "id": "concept-rw-world-numbers-electoral-college", "shape": "concept", "conceptKind": "thing", "tags": [ "thing", "government", "usa" ], "name": "Electoral College", "clues": [ "The mechanism that actually decides who becomes US president, not a direct popular vote.", "Its 538 votes are distributed among the states.", "A candidate must capture 270 of its votes to win the presidency." ], "uid": "14tgvbcwwhgxw" }, { "id": "concept-rw-world-numbers-senate", "shape": "concept", "conceptKind": "thing", "tags": [ "thing", "government", "usa" ], "name": "Senate", "clues": [ "The smaller of the two chambers of the US Congress.", "Every state sends exactly two members to it, regardless of size.", "It seats 100 lawmakers in all, evenly split across the 50 states." ], "uid": "zpcu4b1qx29rd" }, { "id": "concept-rw-world-numbers-house-of-representatives", "shape": "concept", "conceptKind": "thing", "tags": [ "thing", "government", "usa" ], "name": "House of Representatives", "clues": [ "The larger of the two chambers of the US Congress.", "A 1911 law capped its size even as the US population more than tripled.", "It seats 435 voting members, so each now speaks for far more people than the founders intended." ], "uid": "1vxtl0dth6dzf" }, { "id": "concept-rw-world-numbers-national-park-system", "shape": "concept", "conceptKind": "thing", "tags": [ "thing", "usa", "parks" ], "name": "National Park System", "clues": [ "The federal program that safeguards America's grandest landscapes.", "It includes 63 of the country's most celebrated preserves among hundreds of other protected sites.", "Its crown jewels include Yellowstone, Yosemite, and the Grand Canyon." ], "uid": "1j04ub0una746" }, { "id": "concept-rw-world-numbers-cheetah", "shape": "concept", "conceptKind": "thing", "tags": [ "thing", "animals", "records" ], "name": "Cheetah", "clues": [ "The fastest thing on land in the entire animal kingdom.", "It hits about 70 miles per hour, but only in short bursts." ], "uid": "1qrxm2yvk5spo" }, { "id": "concept-rw-world-numbers-blue-whale", "shape": "concept", "conceptKind": "thing", "tags": [ "thing", "animals", "records" ], "name": "Blue Whale", "clues": [ "The largest animal that has ever lived, bigger even than the biggest dinosaurs.", "It can weigh up to 200 tons, its heart alone the size of a small car." ], "uid": "f7ebh5lb2urp" }, { "id": "concept-rw-world-numbers-mariana-trench", "shape": "concept", "conceptKind": "place", "tags": [ "place", "geography", "records" ], "name": "Mariana Trench", "clues": [ "This ocean feature marks the lowest reach of any sea on Earth.", "It bottoms out around 35,900 feet down.", "Its floor sits deeper than Mount Everest is tall." ], "uid": "dctr1lunzuir" }, { "id": "concept-rw-world-numbers-nile-river", "shape": "concept", "conceptKind": "place", "tags": [ "place", "geography", "rivers" ], "name": "Nile River", "clues": [ "No river on Earth runs longer than this one.", "It winds for roughly 4,130 miles." ], "uid": "j7apfs9557ug" }, { "id": "concept-rw-world-numbers-russia", "shape": "concept", "conceptKind": "place", "tags": [ "place", "geography", "countries" ], "name": "Russia", "clues": [ "No nation covers more of the Earth's surface than this one.", "It sprawls across about 6.6 million square miles, the largest country by area." ], "uid": "cy6evm1823fd2" }, { "id": "concept-rw-world-numbers-india", "shape": "concept", "conceptKind": "place", "tags": [ "place", "geography", "countries" ], "name": "India", "clues": [ "No country is now home to more people than this one.", "About 1.43 billion people make it the most populous nation on Earth." ], "uid": "sfz9mr1tpg801" }, { "id": "concept-rw-world-numbers-statue-of-liberty", "shape": "concept", "conceptKind": "thing", "tags": [ "thing", "landmark", "height" ], "name": "Statue of Liberty", "clues": [ "A famous American landmark that stands taller than photos suggest, 305 feet from the ground to its highest point.", "The copper figure itself is only about 151 feet from heel to head; the rest is pedestal and foundation.", "It lifts a torch high, and that torch marks the very top of its 305-foot total height." ], "uid": "1syj77y1izmbpc" }, { "id": "concept-rw-world-numbers-washington-monument", "shape": "concept", "conceptKind": "thing", "tags": [ "thing", "landmark", "height" ], "name": "Washington Monument", "clues": [ "A slender stone landmark in the nation's capital that rises 555 feet into the sky.", "This narrow shaft of stone honors an early American leader.", "It stands 555 feet tall and commemorates the first president of the United States." ], "uid": "1rt3v9vv33vjh" }, { "id": "concept-rw-world-numbers-gateway-arch", "shape": "concept", "conceptKind": "thing", "tags": [ "thing", "landmark", "height" ], "name": "Gateway Arch", "clues": [ "A gleaming stainless-steel landmark shaped like a giant sweeping curve.", "It stands exactly 630 feet tall, and is just as wide at its base as it is high.", "Rising 630 feet over St. Louis, it symbolizes the nation's westward expansion." ], "uid": "1blluwr14mz265" }, { "id": "concept-rw-world-numbers-hoover-dam", "shape": "concept", "conceptKind": "thing", "tags": [ "thing", "landmark", "height" ], "name": "Hoover Dam", "clues": [ "A massive concrete structure that doesn't reach for the sky but instead walls off a great river.", "It rises to a height of 726 feet.", "This barrier holds back the Colorado River from a height of 726 feet." ], "uid": "1vzq4bg10ubp0g" }, { "id": "concept-rw-world-numbers-golden-gate-bridge", "shape": "concept", "conceptKind": "thing", "tags": [ "thing", "landmark", "height" ], "name": "Golden Gate Bridge", "clues": [ "A landmark that works on two scales at once, soaring towers and an enormous horizontal span.", "Its towers stand 746 feet above the water below.", "Its main span stretches an enormous 4,200 feet between those two towers." ], "uid": "1yh6wsxpiv4bj" }, { "id": "concept-rw-world-numbers-amazon-river", "shape": "concept", "conceptKind": "place", "tags": [ "place", "water", "geography" ], "name": "Amazon River", "clues": [ "This waterway ranks just behind the world's longest, yet it moves more water than any other.", "It runs roughly 3,980 miles, only about 150 miles shy of the record holder.", "Though it narrowly loses the length contest, it carries vastly more water than the longest waterway." ], "uid": "1b9o8oqqads78" }, { "id": "concept-rw-world-numbers-angel-falls", "shape": "concept", "conceptKind": "place", "tags": [ "place", "water", "geography" ], "name": "Angel Falls", "clues": [ "The tallest cascade of water on Earth, found in Venezuela.", "This Venezuelan wonder plunges an astonishing 3,212 feet from top to bottom.", "It drops so far that in the dry season the water turns to mist before reaching the ground." ], "uid": "io6glfb9bft" }, { "id": "concept-rw-world-numbers-lake-baikal", "shape": "concept", "conceptKind": "place", "tags": [ "place", "water", "geography" ], "name": "Lake Baikal", "clues": [ "The deepest body of freshwater on the planet, set in Siberia.", "It plunges to about 5,387 feet at its lowest.", "This single Siberian basin holds roughly a fifth of all the world's unfrozen fresh water." ], "uid": "1rbr0od1de8ren" }, { "id": "concept-rw-world-numbers-greater-tokyo", "shape": "concept", "conceptKind": "place", "tags": [ "place", "city", "population" ], "name": "Greater Tokyo", "clues": [ "The largest urban area on the entire planet.", "About 37 million people live in this single metropolitan region.", "This one metro area holds more people than the whole nation of Canada." ], "uid": "hhwur0fh6822" }, { "id": "concept-rw-world-numbers-s-o-paulo", "shape": "concept", "conceptKind": "place", "tags": [ "place", "city", "population" ], "name": "São Paulo", "clues": [ "A megacity of the developing world, though smaller than the very largest urban giants.", "About 12 million people live in this metropolitan area.", "At roughly 12 million, it outsizes the famous capitals of the West but trails the 20-million-plus megacities." ], "uid": "n9eko71frr0ab" }, { "id": "concept-rw-world-numbers-london", "shape": "concept", "conceptKind": "place", "tags": [ "place", "city", "population" ], "name": "London", "clues": [ "One of the historical capitals of Europe, smaller in population than most people expect.", "Its metro population is about 9.5 million.", "At roughly 9.5 million, this famous Western capital is dwarfed by the megacities of Asia and Africa." ], "uid": "1yy3rpyjpoypm" }, { "id": "concept-rw-world-numbers-new-york-city", "shape": "concept", "conceptKind": "place", "tags": [ "place", "city", "population" ], "name": "New York City", "clues": [ "A famous American metropolis whose population is smaller than its global fame suggests.", "The urban core proper is home to about 8.3 million people.", "At about 8.3 million, this leading US center ranks well below the world's true megacities." ], "uid": "1690n5j1j1bz35" }, { "id": "concept-rw-world-numbers-sydney", "shape": "concept", "conceptKind": "place", "tags": [ "place", "city", "population" ], "name": "Sydney", "clues": [ "A well-known Western city, far smaller in headcount than the world's giants.", "Its population is around 5.3 million.", "At roughly 5.3 million, it is the smallest of the famous Western cities in this comparison." ], "uid": "1q9a2i455ap7c" }, { "id": "concept-rw-world-numbers-moon", "shape": "concept", "conceptKind": "place", "tags": [ "place", "astronomy", "space" ], "name": "Moon", "clues": [ "The closest large object to us in space, and the destination of the Apollo missions.", "It lies about 238,855 miles away, a three-day trip for the Apollo crews.", "It is so near that its reflected light reaches Earth in just over a single second." ], "uid": "i2vuczwxsr8p" }, { "id": "concept-rw-world-numbers-mars", "shape": "concept", "conceptKind": "place", "tags": [ "place", "astronomy", "space" ], "name": "Mars", "clues": [ "A neighboring planet whose distance makes any crewed mission a multi-year undertaking.", "Even at its closest approach it lies about 34 million miles from Earth.", "A round-trip crewed journey to this world is measured in years, not days." ], "uid": "1hhao6io4jjaq" }, { "id": "concept-rw-world-numbers-sun", "shape": "concept", "conceptKind": "place", "tags": [ "place", "astronomy", "space" ], "name": "Sun", "clues": [ "The single ordinary star at the heart of our solar system.", "It measures about 864,000 miles across.", "It is so enormous that more than a million Earths could fit inside it." ], "uid": "1tsrsjq1m0jem6" }, { "id": "concept-rw-world-numbers-jupiter", "shape": "concept", "conceptKind": "place", "tags": [ "place", "astronomy", "space" ], "name": "Jupiter", "clues": [ "The largest planet in the solar system.", "It spans about 86,900 miles across.", "As the biggest of the eight planets, it dwarfs Earth yet is far smaller than the star at the center." ], "uid": "1ivcure1bhdwsk" }, { "id": "concept-rw-world-numbers-us-national-debt", "shape": "concept", "conceptKind": "thing", "tags": [ "thing", "money", "economy" ], "name": "US national debt", "clues": [ "The single biggest headline figure in American finance, and it keeps climbing.", "By mid-2026 it had reached roughly $38.9 trillion, growing by more than $2 trillion a year.", "This total the government owes now exceeds a full year of everything the country produces." ], "uid": "1rqf9kd1fzdky5" }, { "id": "concept-rw-world-numbers-us-gdp", "shape": "concept", "conceptKind": "thing", "tags": [ "thing", "money", "economy" ], "name": "US GDP", "clues": [ "A yearly figure capturing the value of everything a single country produces.", "For the United States, it stands at about $30.8 trillion.", "At roughly $30.8 trillion a year, this national output is now smaller than what the government owes." ], "uid": "ruvqjl1d1vn1" }, { "id": "concept-rw-world-numbers-world-gdp", "shape": "concept", "conceptKind": "thing", "tags": [ "thing", "money", "economy" ], "name": "World GDP", "clues": [ "The grandest economic figure of all, the yearly output of the entire planet.", "It totals about $110 trillion.", "Of this $110 trillion global total, the United States alone makes up more than a quarter." ], "uid": "1kql791p0vzuf" }, { "id": "concept-rw-world-numbers-us-federal-budget", "shape": "concept", "conceptKind": "thing", "tags": [ "thing", "money", "economy" ], "name": "US federal budget", "clues": [ "The amount the US government plans to spend over a single year.", "It runs about $6.4 trillion in annual spending.", "At roughly $6.4 trillion, this yearly spending plan tops the entire economy of all but a handful of countries." ], "uid": "i2pgwlasl6mp" }, { "id": "wn-mcq-burj-height", "shape": "mcq", "tags": [ "skyscraper", "height" ], "prompt": { "modality": "text", "value": "How tall is the Burj Khalifa, the world’s tallest building?" }, "options": [ { "modality": "text", "value": "1,776 ft" }, { "modality": "text", "value": "2,073 ft" }, { "modality": "text", "value": "2,717 ft" }, { "modality": "text", "value": "2,227 ft" } ], "correctIndex": 2, "explanation": "The Burj Khalifa in Dubai reaches 2,717 feet — the tallest building on Earth since 2010.", "source": { "label": "Fun with Numbers — Tall Things" }, "uid": "btowrx1s7fgvf" }, { "id": "wn-mcq-second-tallest", "shape": "mcq", "tags": [ "skyscraper", "height" ], "prompt": { "modality": "text", "value": "Which skyscraper is the second-tallest building in the world?" }, "options": [ { "modality": "text", "value": "CN Tower" }, { "modality": "text", "value": "Shanghai Tower" }, { "modality": "text", "value": "Merdeka 118" }, { "modality": "text", "value": "One World Trade Center" } ], "correctIndex": 2, "explanation": "Kuala Lumpur’s Merdeka 118 (2,227 ft) is second only to the Burj Khalifa.", "source": { "label": "Fun with Numbers — Tall Things" }, "uid": "1hesaj01ealno2" }, { "id": "wn-mcq-onewtc-1776", "shape": "mcq", "tags": [ "skyscraper", "height" ], "prompt": { "modality": "text", "value": "How tall is One World Trade Center, the tallest building in the United States?" }, "options": [ { "modality": "text", "value": "1,776 ft" }, { "modality": "text", "value": "1,815 ft" }, { "modality": "text", "value": "2,073 ft" }, { "modality": "text", "value": "1,250 ft" } ], "correctIndex": 0, "explanation": "One WTC stands 1,776 feet — the tallest building in the U.S. and the Western Hemisphere. Its height was deliberately chosen to echo 1776, the year of the Declaration of Independence.", "source": { "label": "Fun with Numbers — Tall Things" }, "uid": "4zsg0a1n9qs9g" }, { "id": "wn-mcq-shanghai-height", "shape": "mcq", "tags": [ "skyscraper", "height" ], "prompt": { "modality": "text", "value": "About how tall is the Shanghai Tower, China’s tallest building?" }, "options": [ { "modality": "text", "value": "1,450 ft" }, { "modality": "text", "value": "2,073 ft" }, { "modality": "text", "value": "1,776 ft" }, { "modality": "text", "value": "2,227 ft" } ], "correctIndex": 1, "explanation": "The Shanghai Tower rises 2,073 feet — the third-tallest building in the world.", "source": { "label": "Fun with Numbers — Tall Things" }, "uid": "5p7wjj1mjvwgh" }, { "id": "wn-mcq-cntower-height", "shape": "mcq", "tags": [ "tower", "height" ], "prompt": { "modality": "text", "value": "How tall is the CN Tower in Toronto?" }, "options": [ { "modality": "text", "value": "1,776 ft" }, { "modality": "text", "value": "1,815 ft" }, { "modality": "text", "value": "1,250 ft" }, { "modality": "text", "value": "2,073 ft" } ], "correctIndex": 1, "explanation": "The CN Tower stands 1,815 feet — the world’s tallest free-standing structure for 32 years.", "source": { "label": "Fun with Numbers — Tall Things" }, "uid": "1w2h3pm1gl1a0o" }, { "id": "wn-mcq-empire-height", "shape": "mcq", "tags": [ "tower", "height" ], "prompt": { "modality": "text", "value": "How tall is the Empire State Building, measured to its roof?" }, "options": [ { "modality": "text", "value": "1,776 ft" }, { "modality": "text", "value": "990 ft" }, { "modality": "text", "value": "1,250 ft" }, { "modality": "text", "value": "1,083 ft" } ], "correctIndex": 2, "explanation": "Measured to its roof, the Empire State Building is 1,250 feet tall.", "source": { "label": "Fun with Numbers — Tall Things" }, "uid": "4rf4ta13vci5k" }, { "id": "wn-mcq-eiffel-height", "shape": "mcq", "tags": [ "tower", "height" ], "prompt": { "modality": "text", "value": "How tall is the Eiffel Tower?" }, "options": [ { "modality": "text", "value": "906 ft" }, { "modality": "text", "value": "1,454 ft" }, { "modality": "text", "value": "1,083 ft" }, { "modality": "text", "value": "1,250 ft" } ], "correctIndex": 2, "explanation": "The Eiffel Tower in Paris stands 1,083 feet tall.", "source": { "label": "Fun with Numbers — Tall Things" }, "uid": "4c6ddmf38moy" }, { "id": "wn-mcq-tallest-iconic", "shape": "mcq", "tags": [ "tower", "height" ], "prompt": { "modality": "text", "value": "Which of these iconic towers is the tallest?" }, "options": [ { "modality": "text", "value": "Empire State Building" }, { "modality": "text", "value": "Washington Monument" }, { "modality": "text", "value": "CN Tower" }, { "modality": "text", "value": "Eiffel Tower" } ], "correctIndex": 2, "explanation": "At 1,815 ft the CN Tower tops the Empire State Building (1,250), Eiffel Tower (1,083), and Washington Monument (555).", "source": { "label": "Fun with Numbers — Tall Things" }, "uid": "1d3v2ll1iw0g8d" }, { "id": "wn-mcq-washmon-height", "shape": "mcq", "tags": [ "monument", "height" ], "prompt": { "modality": "text", "value": "How tall is the Washington Monument?" }, "options": [ { "modality": "text", "value": "481 ft" }, { "modality": "text", "value": "630 ft" }, { "modality": "text", "value": "305 ft" }, { "modality": "text", "value": "555 ft" } ], "correctIndex": 3, "explanation": "The Washington Monument rises 555 feet — once the tallest structure in the world.", "source": { "label": "Fun with Numbers — Tall Things" }, "uid": "59i2j21r9xa2w" }, { "id": "wn-mcq-liberty-height", "shape": "mcq", "tags": [ "monument", "height" ], "prompt": { "modality": "text", "value": "How tall is the Statue of Liberty, from the ground to the torch?" }, "options": [ { "modality": "text", "value": "151 ft" }, { "modality": "text", "value": "305 ft" }, { "modality": "text", "value": "481 ft" }, { "modality": "text", "value": "555 ft" } ], "correctIndex": 1, "explanation": "Ground to torch, the Statue of Liberty measures 305 feet (the statue alone is 151 ft).", "source": { "label": "Fun with Numbers — Tall Things" }, "uid": "pk77jf1yv9bt3" }, { "id": "wn-mcq-ggtowers-height", "shape": "mcq", "tags": [ "bridge", "height" ], "prompt": { "modality": "text", "value": "How tall are the towers of the Golden Gate Bridge?" }, "options": [ { "modality": "text", "value": "746 ft" }, { "modality": "text", "value": "555 ft" }, { "modality": "text", "value": "4,200 ft" }, { "modality": "text", "value": "630 ft" } ], "correctIndex": 0, "explanation": "The Golden Gate’s towers stand 746 feet; 4,200 ft is the length of the main span, not its height.", "source": { "label": "Fun with Numbers — Tall Things" }, "uid": "ewnqex19msenh" }, { "id": "wn-mcq-arch-height", "shape": "mcq", "tags": [ "monument", "height" ], "prompt": { "modality": "text", "value": "How tall is the Gateway Arch in St. Louis?" }, "options": [ { "modality": "text", "value": "481 ft" }, { "modality": "text", "value": "630 ft" }, { "modality": "text", "value": "726 ft" }, { "modality": "text", "value": "555 ft" } ], "correctIndex": 1, "explanation": "The Gateway Arch is 630 feet tall — and 630 feet wide at its base.", "source": { "label": "Fun with Numbers — Tall Things" }, "uid": "1bigd8oe1e976" }, { "id": "wn-mcq-everest-height", "shape": "mcq", "tags": [ "mountains", "height" ], "prompt": { "modality": "text", "value": "How tall is Mount Everest, Earth’s highest peak above sea level?" }, "options": [ { "modality": "text", "value": "28,251 ft" }, { "modality": "text", "value": "29,032 ft" }, { "modality": "text", "value": "26,545 ft" }, { "modality": "text", "value": "27,940 ft" } ], "correctIndex": 1, "explanation": "Everest’s summit is 29,032 feet above sea level — the highest point on Earth.", "source": { "label": "Fun with Numbers — Tall Things" }, "uid": "1e2zkdh1x92m11" }, { "id": "wn-mcq-second-highest", "shape": "mcq", "tags": [ "mountains", "peak" ], "prompt": { "modality": "text", "value": "Which is the second-highest mountain on Earth?" }, "options": [ { "modality": "text", "value": "Denali" }, { "modality": "text", "value": "Aconcagua" }, { "modality": "text", "value": "K2" }, { "modality": "text", "value": "Kilimanjaro" } ], "correctIndex": 2, "explanation": "K2 (28,251 ft) is the world’s second-highest peak, just behind Everest.", "source": { "label": "Fun with Numbers — Tall Things" }, "uid": "elm5zn1w9x1mv" }, { "id": "wn-mcq-denali-continent", "shape": "mcq", "tags": [ "mountains", "peak" ], "prompt": { "modality": "text", "value": "Denali is the highest peak on which continent?" }, "options": [ { "modality": "text", "value": "Africa" }, { "modality": "text", "value": "North America" }, { "modality": "text", "value": "South America" }, { "modality": "text", "value": "Asia" } ], "correctIndex": 1, "explanation": "Denali (20,310 ft) in Alaska is North America’s highest peak.", "source": { "label": "Fun with Numbers — Tall Things" }, "uid": "13q4sqxylzz4l" }, { "id": "wn-mcq-africa-highpoint", "shape": "mcq", "tags": [ "mountains", "peak" ], "prompt": { "modality": "text", "value": "Which mountain is the highest peak in Africa?" }, "options": [ { "modality": "text", "value": "Mount Fuji" }, { "modality": "text", "value": "Mont Blanc" }, { "modality": "text", "value": "Mount Kilimanjaro" }, { "modality": "text", "value": "Denali" } ], "correctIndex": 2, "explanation": "Kilimanjaro (19,341 ft) in Tanzania is Africa’s high point — and the world’s tallest free-standing mountain.", "source": { "label": "Fun with Numbers — Tall Things" }, "uid": "x60hm47c1lo" }, { "id": "wn-mcq-montblanc-range", "shape": "mcq", "tags": [ "mountains", "peak" ], "prompt": { "modality": "text", "value": "Mont Blanc is the highest peak in which mountain range?" }, "options": [ { "modality": "text", "value": "The Rockies" }, { "modality": "text", "value": "The Alps" }, { "modality": "text", "value": "The Andes" }, { "modality": "text", "value": "The Himalayas" } ], "correctIndex": 1, "explanation": "Mont Blanc (15,777 ft) is the highest summit in the Alps.", "source": { "label": "Fun with Numbers — Tall Things" }, "uid": "3ujwos1fa4nfi" }, { "id": "wn-mcq-elevation-def", "shape": "mcq", "tags": [ "mountains", "height" ], "prompt": { "modality": "text", "value": "What does “elevation” measure?" }, "options": [ { "modality": "text", "value": "The height of a point above sea level" }, { "modality": "text", "value": "The depth below sea level" }, { "modality": "text", "value": "The distance from the Earth’s center" }, { "modality": "text", "value": "The height above the ground directly below" } ], "correctIndex": 0, "explanation": "Elevation is height above sea level — which is why a mountain’s elevation differs from its base-to-peak height.", "source": { "label": "Fun with Numbers — Tall Things" }, "uid": "sz0e0w585v4a" }, { "id": "wn-mcq-maunakea-abovesea", "shape": "mcq", "tags": [ "mountains", "height" ], "prompt": { "modality": "text", "value": "Mauna Kea is taller than Everest measured from its seafloor base — but how tall is it above sea level?" }, "options": [ { "modality": "text", "value": "20,310 ft" }, { "modality": "text", "value": "13,803 ft" }, { "modality": "text", "value": "33,000 ft" }, { "modality": "text", "value": "29,032 ft" } ], "correctIndex": 1, "explanation": "Above sea level Mauna Kea is only 13,803 ft, but from its ocean-floor base it rises about 33,000 ft — taller than Everest.", "source": { "label": "Fun with Numbers — Tall Things" }, "uid": "1wvqdyopscau2" }, { "id": "wn-mcq-whitney-contiguous", "shape": "mcq", "tags": [ "mountains", "peak" ], "prompt": { "modality": "text", "value": "Which is the highest peak in the contiguous United States?" }, "options": [ { "modality": "text", "value": "Denali" }, { "modality": "text", "value": "Mauna Kea" }, { "modality": "text", "value": "Mount Whitney" }, { "modality": "text", "value": "Pikes Peak" } ], "correctIndex": 2, "explanation": "Mount Whitney (14,505 ft) is the highest in the lower 48; Denali is higher but sits in Alaska.", "source": { "label": "Fun with Numbers — Tall Things" }, "uid": "11wtcbl7ol6e5" }, { "id": "wn-mcq-everest-vs-maunakea-elevation", "shape": "mcq", "tags": [ "mountains", "height" ], "prompt": { "modality": "text", "value": "By elevation above sea level, which of these is higher?" }, "options": [ { "modality": "text", "value": "They are equal" }, { "modality": "text", "value": "Mauna Kea" }, { "modality": "text", "value": "Mount Everest" }, { "modality": "text", "value": "Mount Whitney" } ], "correctIndex": 2, "explanation": "By elevation Everest (29,032 ft) wins easily; Mauna Kea only exceeds it when measured from its ocean-floor base.", "source": { "label": "Fun with Numbers — Tall Things" }, "uid": "1kwjhxq1ghv7s" }, { "id": "ot-rivers-1", "shape": "mcq", "tags": [ "rivers", "nile" ], "prompt": { "modality": "text", "value": "Which river is usually given the title of the world's longest?" }, "options": [ { "modality": "text", "value": "Yangtze" }, { "modality": "text", "value": "Nile" }, { "modality": "text", "value": "Amazon" }, { "modality": "text", "value": "Mississippi–Missouri" } ], "correctIndex": 1, "explanation": "The Nile, at about 4,130 miles, usually takes the title. The Amazon is slightly shorter but carries far more water.", "source": { "label": "Fun with Numbers — Objective Test" }, "uid": "nih2s1os35q7" }, { "id": "ot-rivers-2", "shape": "mcq", "tags": [ "rivers", "nile" ], "prompt": { "modality": "text", "value": "About how long is the Nile, the world's longest river?" }, "options": [ { "modality": "text", "value": "3,710 miles" }, { "modality": "text", "value": "2,900 miles" }, { "modality": "text", "value": "4,130 miles" }, { "modality": "text", "value": "3,980 miles" } ], "correctIndex": 2, "explanation": "The Nile runs about 4,130 miles. The Amazon (~3,980 mi) and Mississippi–Missouri (~3,710 mi) are shorter.", "source": { "label": "Fun with Numbers — Objective Test" }, "uid": "7ch1dc459jh6" }, { "id": "ot-rivers-3", "shape": "mcq", "tags": [ "rivers", "mississippi" ], "prompt": { "modality": "text", "value": "About how long is the Mississippi–Missouri, North America's longest river system?" }, "options": [ { "modality": "text", "value": "3,710 miles" }, { "modality": "text", "value": "4,130 miles" }, { "modality": "text", "value": "2,900 miles" }, { "modality": "text", "value": "3,980 miles" } ], "correctIndex": 0, "explanation": "The Mississippi–Missouri system runs about 3,710 miles — shorter than the Nile (~4,130 mi) and the Amazon (~3,980 mi).", "source": { "label": "Fun with Numbers — Objective Test" }, "uid": "1iki6s6isn2a" }, { "id": "ot-rivers-4", "shape": "mcq", "tags": [ "waterfalls", "angel-falls" ], "prompt": { "modality": "text", "value": "How tall is Angel Falls, the world's tallest waterfall?" }, "options": [ { "modality": "text", "value": "326 feet" }, { "modality": "text", "value": "3,212 feet" }, { "modality": "text", "value": "5,387 feet" }, { "modality": "text", "value": "6,000 feet" } ], "correctIndex": 1, "explanation": "Angel Falls drops 3,212 feet — so high the water evaporates into mist in the dry season. 326 feet is Niagara.", "source": { "label": "Fun with Numbers — Objective Test" }, "uid": "1ceyf4e1m7hlri" }, { "id": "ot-rivers-5", "shape": "mcq", "tags": [ "waterfalls", "niagara" ], "prompt": { "modality": "text", "value": "Niagara Falls is far shorter than Angel Falls; what gives Niagara its power?" }, "options": [ { "modality": "text", "value": "Its enormous volume of water" }, { "modality": "text", "value": "Its steep gradient" }, { "modality": "text", "value": "Its great height" }, { "modality": "text", "value": "Its narrow channel" } ], "correctIndex": 0, "explanation": "Niagara drops only about 326 feet — its power comes from the huge volume of water, not its height.", "source": { "label": "Fun with Numbers — Objective Test" }, "uid": "1jz02464pb1m8" }, { "id": "ot-depths-1", "shape": "mcq", "tags": [ "ocean", "mariana" ], "prompt": { "modality": "text", "value": "How deep is the Mariana Trench at Challenger Deep, the ocean's deepest point?" }, "options": [ { "modality": "text", "value": "5,387 feet" }, { "modality": "text", "value": "35,876 feet" }, { "modality": "text", "value": "24,901 feet" }, { "modality": "text", "value": "13,000 feet" } ], "correctIndex": 1, "explanation": "Challenger Deep reaches about 35,876 feet — deeper than Everest is tall. 13,000 ft is the Pacific's average depth.", "source": { "label": "Fun with Numbers — Objective Test" }, "uid": "wzp8evnygdbz" }, { "id": "ot-depths-2", "shape": "mcq", "tags": [ "lakes", "baikal" ], "prompt": { "modality": "text", "value": "Which is the deepest lake, holding a fifth of the world's unfrozen fresh water?" }, "options": [ { "modality": "text", "value": "Lake Tanganyika" }, { "modality": "text", "value": "Caspian Sea" }, { "modality": "text", "value": "Lake Superior" }, { "modality": "text", "value": "Lake Baikal" } ], "correctIndex": 3, "explanation": "Siberia's Lake Baikal reaches 5,387 feet and holds about a fifth of Earth's unfrozen fresh water.", "source": { "label": "Fun with Numbers — Objective Test" }, "uid": "rdsm274m3itl" }, { "id": "ot-depths-3", "shape": "mcq", "tags": [ "ocean", "pacific" ], "prompt": { "modality": "text", "value": "What is the average depth of the Pacific Ocean?" }, "options": [ { "modality": "text", "value": "6,000 feet" }, { "modality": "text", "value": "5,387 feet" }, { "modality": "text", "value": "35,876 feet" }, { "modality": "text", "value": "13,000 feet" } ], "correctIndex": 3, "explanation": "The Pacific averages about 13,000 feet deep. 35,876 ft is the Mariana Trench's deepest point, not the average.", "source": { "label": "Fun with Numbers — Objective Test" }, "uid": "1k6ejt418ws8gg" }, { "id": "ot-depths-4", "shape": "mcq", "tags": [ "ocean", "everest" ], "prompt": { "modality": "text", "value": "The Mariana Trench is so deep it exceeds the height of even Earth's tallest mountain above sea level. Which mountain is that?" }, "options": [ { "modality": "text", "value": "Kilimanjaro" }, { "modality": "text", "value": "Denali" }, { "modality": "text", "value": "Mount Everest" }, { "modality": "text", "value": "K2" } ], "correctIndex": 2, "explanation": "At about 35,876 feet, Challenger Deep is deeper than Mount Everest (~29,032 ft) is tall.", "source": { "label": "Fun with Numbers — Objective Test" }, "uid": "1odg8wr1nuv2hx" }, { "id": "ot-idwater-1", "shape": "mcq", "tags": [ "rivers", "amazon" ], "prompt": { "modality": "text", "value": "Which river carries vastly more water than any other, though slightly shorter than the Nile?" }, "options": [ { "modality": "text", "value": "Yangtze River" }, { "modality": "text", "value": "Mississippi River" }, { "modality": "text", "value": "Amazon River" }, { "modality": "text", "value": "Congo River" } ], "correctIndex": 2, "explanation": "The Amazon is just behind the Nile in length but carries vastly more water than any other river.", "source": { "label": "Fun with Numbers — Objective Test" }, "uid": "pifzh8twlxbw" }, { "id": "ot-idwater-2", "shape": "mcq", "tags": [ "waterfalls", "angel-falls" ], "prompt": { "modality": "text", "value": "Which waterfall is so tall that in the dry season its water evaporates into mist before reaching the bottom?" }, "options": [ { "modality": "text", "value": "Niagara Falls" }, { "modality": "text", "value": "Angel Falls" }, { "modality": "text", "value": "Victoria Falls" }, { "modality": "text", "value": "Iguazu Falls" } ], "correctIndex": 1, "explanation": "Angel Falls in Venezuela drops 3,212 feet — so high the water mists away in the dry season.", "source": { "label": "Fun with Numbers — Objective Test" }, "uid": "ry2eg190z3jx" }, { "id": "ot-idwater-3", "shape": "mcq", "tags": [ "lakes", "baikal" ], "prompt": { "modality": "text", "value": "Which lake holds about a fifth of the world's unfrozen fresh water?" }, "options": [ { "modality": "text", "value": "Lake Baikal" }, { "modality": "text", "value": "Caspian Sea" }, { "modality": "text", "value": "Lake Victoria" }, { "modality": "text", "value": "Lake Superior" } ], "correctIndex": 0, "explanation": "Lake Baikal, the deepest lake, holds roughly a fifth of the world's unfrozen fresh water.", "source": { "label": "Fun with Numbers — Objective Test" }, "uid": "wee1b7helq8l" }, { "id": "ot-idwater-4", "shape": "mcq", "tags": [ "waterfalls", "venezuela" ], "prompt": { "modality": "text", "value": "Angel Falls, the world's tallest waterfall, is located in which country?" }, "options": [ { "modality": "text", "value": "Venezuela" }, { "modality": "text", "value": "Peru" }, { "modality": "text", "value": "Colombia" }, { "modality": "text", "value": "Brazil" } ], "correctIndex": 0, "explanation": "Angel Falls, the tallest waterfall on Earth at 3,212 feet, is in Venezuela.", "source": { "label": "Fun with Numbers — Objective Test" }, "uid": "l0tzht91vk8r" }, { "id": "ot-idwater-5", "shape": "mcq", "tags": [ "lakes", "siberia" ], "prompt": { "modality": "text", "value": "Lake Baikal, the world's deepest lake, lies in which region?" }, "options": [ { "modality": "text", "value": "Central Asia" }, { "modality": "text", "value": "Siberia" }, { "modality": "text", "value": "Scandinavia" }, { "modality": "text", "value": "Canada" } ], "correctIndex": 1, "explanation": "Lake Baikal is in Siberia, reaching 5,387 feet — the deepest lake on Earth.", "source": { "label": "Fun with Numbers — Objective Test" }, "uid": "tpijld1v6q3q5" }, { "id": "ot-land-1", "shape": "mcq", "tags": [ "grand-canyon", "land" ], "prompt": { "modality": "text", "value": "How deep is the Grand Canyon, from rim to river?" }, "options": [ { "modality": "text", "value": "3,212 feet" }, { "modality": "text", "value": "6,000 feet" }, { "modality": "text", "value": "1,410 feet" }, { "modality": "text", "value": "13,000 feet" } ], "correctIndex": 1, "explanation": "The Grand Canyon is about 6,000 feet — roughly a mile — from rim to river, carved by the Colorado.", "source": { "label": "Fun with Numbers — Objective Test" }, "uid": "495wmk1fnfoc" }, { "id": "ot-land-2", "shape": "mcq", "tags": [ "great-wall", "land" ], "prompt": { "modality": "text", "value": "Counting all its branches, how long is the Great Wall of China?" }, "options": [ { "modality": "text", "value": "6,600 miles" }, { "modality": "text", "value": "3,600 miles" }, { "modality": "text", "value": "13,171 miles" }, { "modality": "text", "value": "24,901 miles" } ], "correctIndex": 2, "explanation": "The Great Wall runs about 13,171 miles — more than half the planet's circumference (24,901 mi).", "source": { "label": "Fun with Numbers — Objective Test" }, "uid": "f0t6fp11dg3jb" }, { "id": "ot-land-3", "shape": "mcq", "tags": [ "dead-sea", "land" ], "prompt": { "modality": "text", "value": "Which is the lowest land on Earth, sitting about 1,410 feet below sea level?" }, "options": [ { "modality": "text", "value": "The Dead Sea" }, { "modality": "text", "value": "The Caspian Depression" }, { "modality": "text", "value": "Death Valley" }, { "modality": "text", "value": "The Mariana Trench" } ], "correctIndex": 0, "explanation": "The Dead Sea's surface is about 1,410 feet below sea level — the lowest land on Earth. The Mariana Trench is ocean, not land.", "source": { "label": "Fun with Numbers — Objective Test" }, "uid": "s89a4r1g7t4lj" }, { "id": "ot-land-4", "shape": "mcq", "tags": [ "alaska", "states" ], "prompt": { "modality": "text", "value": "Which US state is the largest, covering about 663,000 square miles and larger than most countries?" }, "options": [ { "modality": "text", "value": "Alaska" }, { "modality": "text", "value": "Texas" }, { "modality": "text", "value": "Montana" }, { "modality": "text", "value": "California" } ], "correctIndex": 0, "explanation": "Alaska covers about 663,000 square miles, the largest US state and bigger than most countries.", "source": { "label": "Fun with Numbers — Objective Test" }, "uid": "18gwvx8u6f8su" }, { "id": "ot-dist-1", "shape": "mcq", "tags": [ "circumference", "distance" ], "prompt": { "modality": "text", "value": "What is the Earth's circumference at the equator?" }, "options": [ { "modality": "text", "value": "13,171 miles" }, { "modality": "text", "value": "9,537 miles" }, { "modality": "text", "value": "24,901 miles" }, { "modality": "text", "value": "2,901 miles" } ], "correctIndex": 2, "explanation": "The equatorial circumference is 24,901 miles — the distance to go all the way around the planet.", "source": { "label": "Fun with Numbers — Objective Test" }, "uid": "km7lk91hxwr8f" }, { "id": "ot-dist-2", "shape": "mcq", "tags": [ "flight", "distance" ], "prompt": { "modality": "text", "value": "About how far is the New York to Singapore nonstop flight, the world's longest?" }, "options": [ { "modality": "text", "value": "9,537 miles" }, { "modality": "text", "value": "2,450 miles" }, { "modality": "text", "value": "4,130 miles" }, { "modality": "text", "value": "24,901 miles" } ], "correctIndex": 0, "explanation": "The NY–Singapore nonstop covers about 9,537 miles in some 18 hours — the longest commercial flight.", "source": { "label": "Fun with Numbers — Objective Test" }, "uid": "1wmjghn12z3ij3" }, { "id": "ot-dist-3", "shape": "mcq", "tags": [ "channel", "distance" ], "prompt": { "modality": "text", "value": "At its narrowest, at the Strait of Dover, how wide is the English Channel?" }, "options": [ { "modality": "text", "value": "66 miles" }, { "modality": "text", "value": "326 miles" }, { "modality": "text", "value": "21 miles" }, { "modality": "text", "value": "195 miles" } ], "correctIndex": 2, "explanation": "The English Channel is only about 21 miles wide at Dover — close enough that strong swimmers cross it.", "source": { "label": "Fun with Numbers — Objective Test" }, "uid": "dj629117us2zh" }, { "id": "ot-dist-4", "shape": "mcq", "tags": [ "countries", "world" ], "prompt": { "modality": "text", "value": "About how many countries are there in the world (UN members plus observers)?" }, "options": [ { "modality": "text", "value": "251" }, { "modality": "text", "value": "88" }, { "modality": "text", "value": "195" }, { "modality": "text", "value": "150" } ], "correctIndex": 2, "explanation": "There are about 195 countries — a number that feels small for a planet of eight billion people.", "source": { "label": "Fun with Numbers — Objective Test" }, "uid": "14irl621bakgaa" }, { "id": "ot-dist-5", "shape": "mcq", "tags": [ "route66", "distance" ], "prompt": { "modality": "text", "value": "About how long was historic Route 66, from Chicago to Santa Monica?" }, "options": [ { "modality": "text", "value": "1,410 miles" }, { "modality": "text", "value": "24,901 miles" }, { "modality": "text", "value": "9,537 miles" }, { "modality": "text", "value": "2,448 miles" } ], "correctIndex": 3, "explanation": "Route 66 stretched about 2,448 miles from Chicago to Santa Monica across eight states.", "source": { "label": "Fun with Numbers — Objective Test" }, "uid": "1d21ufz1azmlkb" }, { "id": "ot-megacities-tokyo-num", "shape": "mcq", "tags": [ "tokyo", "population" ], "prompt": { "modality": "text", "value": "About how many people live in the Greater Tokyo metro area?" }, "options": [ { "modality": "text", "value": "20 million" }, { "modality": "text", "value": "37 million" }, { "modality": "text", "value": "9.5 million" }, { "modality": "text", "value": "12 million" } ], "correctIndex": 1, "explanation": "Greater Tokyo holds about 37 million people, the largest metro area on Earth — more than the entire population of Canada.", "source": { "label": "Fun with Numbers — Objective Test" }, "uid": "yn6amg1whkm3u" }, { "id": "ot-megacities-magnitude", "shape": "mcq", "tags": [ "ranking", "magnitude" ], "prompt": { "modality": "text", "value": "Greater Tokyo holds about 37 million people. That is roughly how many times the size of São Paulo's ~12 million?" }, "options": [ { "modality": "text", "value": "About 10 times" }, { "modality": "text", "value": "About 3 times" }, { "modality": "text", "value": "About 6 times" }, { "modality": "text", "value": "About the same" } ], "correctIndex": 1, "explanation": "37M ÷ 12M ≈ 3, showing how far Tokyo outstrips even a major megacity like São Paulo.", "source": { "label": "Fun with Numbers — Objective Test" }, "uid": "1crkmcr1h6oxhr" }, { "id": "ot-megacities-canada", "shape": "mcq", "tags": [ "tokyo", "comparison" ], "prompt": { "modality": "text", "value": "The guide says Greater Tokyo holds more people than the entire population of which country?" }, "options": [ { "modality": "text", "value": "Canada" }, { "modality": "text", "value": "Algeria" }, { "modality": "text", "value": "Argentina" }, { "modality": "text", "value": "Kenya" } ], "correctIndex": 0, "explanation": "Tokyo's ~37 million exceeds Canada's whole population per the guide's figures. Algeria, Argentina, and Kenya are each also in the tens-of-millions range, but all still outnumber Tokyo's metro population.", "source": { "label": "Fun with Numbers — Objective Test" }, "uid": "c2i91oc79a4u" }, { "id": "ot-megacities-not", "shape": "mcq", "tags": [ "ranking", "saopaulo" ], "prompt": { "modality": "text", "value": "Which of these metro areas does NOT hold more than 20 million people?" }, "options": [ { "modality": "text", "value": "Cairo" }, { "modality": "text", "value": "London" }, { "modality": "text", "value": "Mumbai" }, { "modality": "text", "value": "Tokyo" } ], "correctIndex": 1, "explanation": "London's metro area holds about 9.6 million — comfortably under the line. Tokyo (~37M), Cairo (~22M) and Mumbai (~21M) all top 20 million.", "source": { "label": "Fun with Numbers — Objective Test" }, "uid": "pxnk7hvkx6o7" }, { "id": "ot-west-london-num", "shape": "mcq", "tags": [ "london", "population" ], "prompt": { "modality": "text", "value": "About how many people live in London?" }, "options": [ { "modality": "text", "value": "20 million" }, { "modality": "text", "value": "9.5 million" }, { "modality": "text", "value": "37 million" }, { "modality": "text", "value": "2.2 million" } ], "correctIndex": 1, "explanation": "London has about 9.5 million — large for the West, but far below true giants like Tokyo (~37M).", "source": { "label": "Fun with Numbers — Objective Test" }, "uid": "kcln1m10wwqtq" }, { "id": "ot-west-sydney-num", "shape": "mcq", "tags": [ "sydney", "population" ], "prompt": { "modality": "text", "value": "Sydney's population is closest to which figure?" }, "options": [ { "modality": "text", "value": "2.2 million" }, { "modality": "text", "value": "5.3 million" }, { "modality": "text", "value": "9.5 million" }, { "modality": "text", "value": "12 million" } ], "correctIndex": 1, "explanation": "Sydney has around 5.3 million people, smaller than London and New York City.", "source": { "label": "Fun with Numbers — Objective Test" }, "uid": "1nr12251lhy8ap" }, { "id": "ot-west-largest", "shape": "mcq", "tags": [ "ranking", "western" ], "prompt": { "modality": "text", "value": "Which of these famous Western cities has the largest population?" }, "options": [ { "modality": "text", "value": "Paris" }, { "modality": "text", "value": "London" }, { "modality": "text", "value": "Sydney" }, { "modality": "text", "value": "New York City" } ], "correctIndex": 1, "explanation": "London (~9.5M) leads, ahead of NYC (~8.3M), Sydney (~5.3M), and Paris (~2.2M).", "source": { "label": "Fun with Numbers — Objective Test" }, "uid": "157uty819fv5ti" }, { "id": "ot-west-smallest", "shape": "mcq", "tags": [ "paris", "ranking" ], "prompt": { "modality": "text", "value": "Which of these famous Western cities has the fewest people?" }, "options": [ { "modality": "text", "value": "Paris" }, { "modality": "text", "value": "London" }, { "modality": "text", "value": "Sydney" }, { "modality": "text", "value": "New York City" } ], "correctIndex": 0, "explanation": "Paris proper has only about 2.2 million, below Sydney (~5.3M), NYC (~8.3M), and London (~9.5M).", "source": { "label": "Fun with Numbers — Objective Test" }, "uid": "1hdzpy96bjjsb" }, { "id": "ot-west-tokyo-compare", "shape": "mcq", "tags": [ "comparison", "tokyo" ], "prompt": { "modality": "text", "value": "London's metro is about 9.5 million; Greater Tokyo about 37 million. Tokyo is roughly how many times larger?" }, "options": [ { "modality": "text", "value": "About 10 times" }, { "modality": "text", "value": "About 4 times" }, { "modality": "text", "value": "About the same" }, { "modality": "text", "value": "About 2 times" } ], "correctIndex": 1, "explanation": "37M ÷ 9.5M ≈ 4, showing how Western capitals trail Asia's true giants.", "source": { "label": "Fun with Numbers — Objective Test" }, "uid": "1r3tgueq4yy08" }, { "id": "ot-id-tokyo", "shape": "mcq", "tags": [ "identify", "tokyo" ], "prompt": { "modality": "text", "value": "Which city is the largest metro area on Earth, home to about 37 million — more than all of Canada?" }, "options": [ { "modality": "text", "value": "Greater Tokyo" }, { "modality": "text", "value": "Mumbai" }, { "modality": "text", "value": "London" }, { "modality": "text", "value": "New York City" } ], "correctIndex": 0, "explanation": "Greater Tokyo is the world's largest metro area at about 37 million people.", "source": { "label": "Fun with Numbers — Objective Test" }, "uid": "hbwi5xarsn45" }, { "id": "ot-id-saopaulo", "shape": "mcq", "tags": [ "identify", "saopaulo" ], "prompt": { "modality": "text", "value": "Which South American megacity holds about 12 million people?" }, "options": [ { "modality": "text", "value": "São Paulo" }, { "modality": "text", "value": "Buenos Aires" }, { "modality": "text", "value": "Bogotá" }, { "modality": "text", "value": "Lima" } ], "correctIndex": 0, "explanation": "São Paulo, Brazil, has about 12 million people — the largest of these South American cities. Buenos Aires, Bogotá, and Lima are each smaller.", "source": { "label": "Fun with Numbers — Objective Test" }, "uid": "5mvunww1daco" }, { "id": "ot-id-london", "shape": "mcq", "tags": [ "identify", "london" ], "prompt": { "modality": "text", "value": "Which European city has about 9.5 million people?" }, "options": [ { "modality": "text", "value": "Paris" }, { "modality": "text", "value": "Madrid" }, { "modality": "text", "value": "Berlin" }, { "modality": "text", "value": "London" } ], "correctIndex": 3, "explanation": "London has about 9.5 million, the largest of these European cities. Paris, Madrid, and Berlin are each smaller.", "source": { "label": "Fun with Numbers — Objective Test" }, "uid": "fn22qbfkhk57" }, { "id": "ot-id-nyc", "shape": "mcq", "tags": [ "identify", "nyc" ], "prompt": { "modality": "text", "value": "Which US city proper is home to about 8.3 million people?" }, "options": [ { "modality": "text", "value": "Los Angeles" }, { "modality": "text", "value": "Chicago" }, { "modality": "text", "value": "New York City" }, { "modality": "text", "value": "Houston" } ], "correctIndex": 2, "explanation": "New York City proper has about 8.3 million residents — the largest US city. Los Angeles, Chicago, and Houston are each smaller.", "source": { "label": "Fun with Numbers — Objective Test" }, "uid": "18pqh8z10vf1j9" }, { "id": "ot-id-sydney", "shape": "mcq", "tags": [ "identify", "sydney" ], "prompt": { "modality": "text", "value": "Which Australian city has a population of about 5.3 million?" }, "options": [ { "modality": "text", "value": "Sydney" }, { "modality": "text", "value": "Melbourne" }, { "modality": "text", "value": "Brisbane" }, { "modality": "text", "value": "Perth" } ], "correctIndex": 0, "explanation": "Sydney has around 5.3 million people — Australia's largest city. Melbourne, Brisbane, and Perth are each smaller.", "source": { "label": "Fun with Numbers — Objective Test" }, "uid": "5ezt71du9o9x" }, { "id": "ot-nations-most", "shape": "mcq", "tags": [ "india", "ranking" ], "prompt": { "modality": "text", "value": "Which is the most populous country on Earth?" }, "options": [ { "modality": "text", "value": "United States" }, { "modality": "text", "value": "China" }, { "modality": "text", "value": "India" }, { "modality": "text", "value": "Indonesia" } ], "correctIndex": 2, "explanation": "India, at about 1.43 billion, recently overtook China (~1.41B) as the most populous country.", "source": { "label": "Fun with Numbers — Objective Test" }, "uid": "1jk48ebhouh3j" }, { "id": "ot-nations-us-rank", "shape": "mcq", "tags": [ "usa", "ranking" ], "prompt": { "modality": "text", "value": "Which country is the third-most populous, a distant third behind the two Asian giants?" }, "options": [ { "modality": "text", "value": "Brazil" }, { "modality": "text", "value": "United States" }, { "modality": "text", "value": "Russia" }, { "modality": "text", "value": "Indonesia" } ], "correctIndex": 1, "explanation": "The US is third at ~336 million — less than a quarter of either India or China.", "source": { "label": "Fun with Numbers — Objective Test" }, "uid": "74c2oi17qmcpg" }, { "id": "ot-nations-world-num", "shape": "mcq", "tags": [ "world", "population" ], "prompt": { "modality": "text", "value": "What is the approximate world population as of 2026?" }, "options": [ { "modality": "text", "value": "8.1 billion" }, { "modality": "text", "value": "336 million" }, { "modality": "text", "value": "745 million" }, { "modality": "text", "value": "1.4 billion" } ], "correctIndex": 0, "explanation": "World population stands at roughly 8.1 billion, adding another billion every dozen years or so.", "source": { "label": "Fun with Numbers — Objective Test" }, "uid": "rlg0dw1ktmzj6" }, { "id": "ot-nations-india-num", "shape": "mcq", "tags": [ "india", "population" ], "prompt": { "modality": "text", "value": "India's population is closest to which figure?" }, "options": [ { "modality": "text", "value": "8.1 billion" }, { "modality": "text", "value": "336 million" }, { "modality": "text", "value": "1.43 billion" }, { "modality": "text", "value": "745 million" } ], "correctIndex": 2, "explanation": "India has about 1.43 billion people, just ahead of China's ~1.41 billion.", "source": { "label": "Fun with Numbers — Objective Test" }, "uid": "95zakdf0e3c3" }, { "id": "ot-pop-def", "shape": "mcq", "tags": [ "definition" ], "prompt": { "modality": "text", "value": "What does the term 'population' mean?" }, "options": [ { "modality": "text", "value": "The total number of people living in a place" }, { "modality": "text", "value": "The number of households in a place" }, { "modality": "text", "value": "The land area of a place" }, { "modality": "text", "value": "The number of cities in a country" } ], "correctIndex": 0, "explanation": "Population is the total number of people living in a place — not its area, cities, or households.", "source": { "label": "Fun with Numbers — Objective Test" }, "uid": "mgjlqjo84owl" }, { "id": "ot-pop-overtook", "shape": "mcq", "tags": [ "india", "china" ], "prompt": { "modality": "text", "value": "India recently overtook which country to become the most populous?" }, "options": [ { "modality": "text", "value": "United States" }, { "modality": "text", "value": "Russia" }, { "modality": "text", "value": "China" }, { "modality": "text", "value": "Indonesia" } ], "correctIndex": 2, "explanation": "India passed China as its population kept growing while China's leveled off; each is above 1.4 billion.", "source": { "label": "Fun with Numbers — Objective Test" }, "uid": "r7ojj41hwl2m4" }, { "id": "ot-pop-threshold", "shape": "mcq", "tags": [ "population", "comparison" ], "prompt": { "modality": "text", "value": "India and China each have a population above roughly what figure?" }, "options": [ { "modality": "text", "value": "336 million" }, { "modality": "text", "value": "1.4 billion" }, { "modality": "text", "value": "8.1 billion" }, { "modality": "text", "value": "745 million" } ], "correctIndex": 1, "explanation": "Both India (~1.43B) and China (~1.41B) exceed 1.4 billion people.", "source": { "label": "Fun with Numbers — Objective Test" }, "uid": "1yewwm3wtfcyx" }, { "id": "ot-pop-us-fraction", "shape": "mcq", "tags": [ "comparison", "usa" ], "prompt": { "modality": "text", "value": "The US population (~336M) is about what share of India's (~1.43B)?" }, "options": [ { "modality": "text", "value": "About half" }, { "modality": "text", "value": "Roughly equal" }, { "modality": "text", "value": "Less than a quarter" }, { "modality": "text", "value": "About three-quarters" } ], "correctIndex": 2, "explanation": "At ~336M versus ~1.43B, the US is less than a quarter of India — a distant third.", "source": { "label": "Fun with Numbers — Objective Test" }, "uid": "xk5xks83xthe" }, { "id": "ot-pop-europe", "shape": "mcq", "tags": [ "comparison", "europe" ], "prompt": { "modality": "text", "value": "India's ~1.43 billion people compared with all of Europe's ~745 million is roughly:" }, "options": [ { "modality": "text", "value": "Ten times as many" }, { "modality": "text", "value": "About half" }, { "modality": "text", "value": "About equal" }, { "modality": "text", "value": "Nearly double" } ], "correctIndex": 3, "explanation": "India alone (~1.43B) nearly doubles Europe's ~745 million, in a fraction of the land area.", "source": { "label": "Fun with Numbers — Objective Test" }, "uid": "1dxa01o18dpegq" }, { "id": "ot-cosmicdist-1", "shape": "mcq", "tags": [ "moon", "distance" ], "prompt": { "modality": "text", "value": "About how far is the Moon from Earth?" }, "options": [ { "modality": "text", "value": "7,918 miles" }, { "modality": "text", "value": "93 million miles" }, { "modality": "text", "value": "34 million miles" }, { "modality": "text", "value": "238,855 miles" } ], "correctIndex": 3, "explanation": "The Moon sits about 238,855 miles away. 93 million miles is the distance to the Sun and 34 million is Mars at closest approach; 7,918 miles is Earth's diameter.", "source": { "label": "Fun with Numbers — Objective Test" }, "uid": "uxid6vsn8yod" }, { "id": "ot-cosmicdist-2", "shape": "mcq", "tags": [ "sun", "astronomical-unit" ], "prompt": { "modality": "text", "value": "The Sun is about 93 million miles from Earth. What is this distance also called?" }, "options": [ { "modality": "text", "value": "One light-second" }, { "modality": "text", "value": "One parsec" }, { "modality": "text", "value": "One astronomical unit (AU)" }, { "modality": "text", "value": "One light-year" } ], "correctIndex": 2, "explanation": "The Earth-Sun distance of about 93 million miles is defined as one astronomical unit (AU), the solar system's yardstick. A light-year is far larger (5.88 trillion miles).", "source": { "label": "Fun with Numbers — Objective Test" }, "uid": "1iph15g179t8ki" }, { "id": "ot-cosmicdist-3", "shape": "mcq", "tags": [ "mars", "distance" ], "prompt": { "modality": "text", "value": "At its closest approach, roughly how far is Mars from Earth?" }, "options": [ { "modality": "text", "value": "93 million miles" }, { "modality": "text", "value": "250 miles" }, { "modality": "text", "value": "238,855 miles" }, { "modality": "text", "value": "34 million miles" } ], "correctIndex": 3, "explanation": "Mars at closest approach is about 34 million miles away — still far enough that a crewed round-trip takes years. 93 million is the Sun; 238,855 the Moon; 250 the ISS altitude.", "source": { "label": "Fun with Numbers — Objective Test" }, "uid": "s7uh9p13845s9" }, { "id": "ot-cosmicdist-4", "shape": "mcq", "tags": [ "iss", "earth", "reference-scale" ], "prompt": { "modality": "text", "value": "Which near-Earth reference figure is stated INCORRECTLY?" }, "options": [ { "modality": "text", "value": "Earth is about 7,918 miles in diameter" }, { "modality": "text", "value": "The ISS orbits about 2,500 miles up" }, { "modality": "text", "value": "The Moon is about 238,855 miles away" }, { "modality": "text", "value": "The ISS orbits about 250 miles up" } ], "correctIndex": 1, "explanation": "The ISS orbits only about 250 miles up, not 2,500. Earth's diameter (7,918 miles) and the Moon's distance (238,855 miles) are stated correctly.", "source": { "label": "Fun with Numbers — Objective Test" }, "uid": "1hu5im14ule1w" }, { "id": "ot-lightyear-1", "shape": "mcq", "tags": [ "light-year", "definition" ], "prompt": { "modality": "text", "value": "What does a light-year measure?" }, "options": [ { "modality": "text", "value": "One year as measured on a distant star" }, { "modality": "text", "value": "The time light takes to cross the solar system" }, { "modality": "text", "value": "The distance light travels in one year" }, { "modality": "text", "value": "The brightness of a star over a year" } ], "correctIndex": 2, "explanation": "Despite the word 'year,' a light-year is a distance — how far light travels in one year, about 5.88 trillion miles. It is not a unit of time or brightness.", "source": { "label": "Fun with Numbers — Objective Test" }, "uid": "10svk0g16pgxo4" }, { "id": "ot-lightyear-2", "shape": "mcq", "tags": [ "light-year", "distance" ], "prompt": { "modality": "text", "value": "Roughly how far does light travel in one year (one light-year)?" }, "options": [ { "modality": "text", "value": "About 93 million miles" }, { "modality": "text", "value": "About 186,000 miles" }, { "modality": "text", "value": "About 9.46 million miles" }, { "modality": "text", "value": "About 5.88 trillion miles" } ], "correctIndex": 3, "explanation": "Light covers about 5.88 trillion miles (9.46 trillion km) in a year. 93 million miles is one AU and 186,000 miles is how far light goes in a single second.", "source": { "label": "Fun with Numbers — Objective Test" }, "uid": "aqxerd1pwfzf" }, { "id": "ot-lightyear-3", "shape": "mcq", "tags": [ "light-year", "proxima-centauri" ], "prompt": { "modality": "text", "value": "Proxima Centauri, the nearest star beyond the Sun, lies roughly how far away?" }, "options": [ { "modality": "text", "value": "About one light-year" }, { "modality": "text", "value": "About four astronomical units" }, { "modality": "text", "value": "About four light-years" }, { "modality": "text", "value": "About forty light-years" } ], "correctIndex": 2, "explanation": "The nearest star beyond the Sun is a bit over four light-years away — trillions of miles. An astronomical unit (Earth-Sun distance) would be far too small a yardstick.", "source": { "label": "Fun with Numbers — Objective Test" }, "uid": "1u747u2c08uu" }, { "id": "ot-lightyear-4", "shape": "mcq", "tags": [ "moon", "identify" ], "prompt": { "modality": "text", "value": "Which body is about 238,855 miles away and took Apollo astronauts three days to reach?" }, "options": [ { "modality": "text", "value": "Mars" }, { "modality": "text", "value": "The Moon" }, { "modality": "text", "value": "The Sun" }, { "modality": "text", "value": "The ISS" } ], "correctIndex": 1, "explanation": "The Moon is about 238,855 miles away, a three-day Apollo journey. Mars and the Sun are millions of miles off, while the ISS orbits just 250 miles up.", "source": { "label": "Fun with Numbers — Objective Test" }, "uid": "17dt5ffw7691j" }, { "id": "ot-lightyear-5", "shape": "mcq", "tags": [ "mars", "identify" ], "prompt": { "modality": "text", "value": "Which planet's closest approach to Earth is about 34 million miles, so a crewed round-trip is measured in years?" }, "options": [ { "modality": "text", "value": "Mars" }, { "modality": "text", "value": "Jupiter" }, { "modality": "text", "value": "The Moon" }, { "modality": "text", "value": "Venus" } ], "correctIndex": 0, "explanation": "Mars comes within about 34 million miles at closest approach, making a round-trip mission take years. The Moon is not a planet, and Jupiter and Venus are not the guide's example here.", "source": { "label": "Fun with Numbers — Objective Test" }, "uid": "1pue1ub196hi4z" }, { "id": "ot-sizespeed-1", "shape": "mcq", "tags": [ "sun", "size" ], "prompt": { "modality": "text", "value": "About how large across is the Sun?" }, "options": [ { "modality": "text", "value": "186,000 miles" }, { "modality": "text", "value": "7,918 miles" }, { "modality": "text", "value": "864,000 miles" }, { "modality": "text", "value": "86,900 miles" } ], "correctIndex": 2, "explanation": "The Sun spans about 864,000 miles — big enough to hold over a million Earths. 86,900 miles is Jupiter's diameter and 7,918 miles is Earth's.", "source": { "label": "Fun with Numbers — Objective Test" }, "uid": "sx787od913q4" }, { "id": "ot-sizespeed-2", "shape": "mcq", "tags": [ "jupiter", "size" ], "prompt": { "modality": "text", "value": "Jupiter, the largest planet, is about how many miles across?" }, "options": [ { "modality": "text", "value": "864,000 miles" }, { "modality": "text", "value": "86,900 miles" }, { "modality": "text", "value": "238,855 miles" }, { "modality": "text", "value": "7,918 miles" } ], "correctIndex": 1, "explanation": "Jupiter spans about 86,900 miles. 864,000 miles is the far larger Sun, 7,918 miles is Earth, and 238,855 miles is the Earth-Moon distance.", "source": { "label": "Fun with Numbers — Objective Test" }, "uid": "yexnea1n5wt7e" }, { "id": "ot-sizespeed-3", "shape": "mcq", "tags": [ "light-speed" ], "prompt": { "modality": "text", "value": "About how fast does light travel?" }, "options": [ { "modality": "text", "value": "5.88 trillion miles per hour" }, { "modality": "text", "value": "186,000 miles per second" }, { "modality": "text", "value": "17,500 miles per hour" }, { "modality": "text", "value": "93 million miles per second" } ], "correctIndex": 1, "explanation": "Light moves about 186,000 miles per second — fast enough to circle Earth seven times in a second. 17,500 mph is the ISS's orbital speed, far slower.", "source": { "label": "Fun with Numbers — Objective Test" }, "uid": "w38bskh7dw28" }, { "id": "ot-sizespeed-4", "shape": "mcq", "tags": [ "universe", "age" ], "prompt": { "modality": "text", "value": "About how old is the universe, since the Big Bang?" }, "options": [ { "modality": "text", "value": "138 billion years" }, { "modality": "text", "value": "4.5 billion years" }, { "modality": "text", "value": "13.8 billion years" }, { "modality": "text", "value": "1.38 billion years" } ], "correctIndex": 2, "explanation": "The universe is about 13.8 billion years old. 4.5 billion is closer to Earth's age; 1.38 billion and 138 billion misplace the decimal by a factor of ten.", "source": { "label": "Fun with Numbers — Objective Test" }, "uid": "de68jx1dto4m1" }, { "id": "ot-sizespeed-5", "shape": "mcq", "tags": [ "planets", "count" ], "prompt": { "modality": "text", "value": "How many planets circle the Sun in our solar system?" }, "options": [ { "modality": "text", "value": "7" }, { "modality": "text", "value": "12" }, { "modality": "text", "value": "9" }, { "modality": "text", "value": "8" } ], "correctIndex": 3, "explanation": "The solar system has 8 planets orbiting one ordinary star. The count was 9 before Pluto's reclassification, but the guide gives 8.", "source": { "label": "Fun with Numbers — Objective Test" }, "uid": "1mce8gt66kx0f" }, { "id": "ot-issorbit-1", "shape": "mcq", "tags": [ "iss", "speed" ], "prompt": { "modality": "text", "value": "About how fast does the International Space Station travel in orbit?" }, "options": [ { "modality": "text", "value": "250 miles per hour" }, { "modality": "text", "value": "186,000 miles per hour" }, { "modality": "text", "value": "1,750 miles per hour" }, { "modality": "text", "value": "17,500 miles per hour" } ], "correctIndex": 3, "explanation": "The ISS races around Earth at about 17,500 mph. 250 is its altitude in miles, not its speed, and 186,000 miles per second is the speed of light.", "source": { "label": "Fun with Numbers — Objective Test" }, "uid": "1fmisuw1clyri8" }, { "id": "ot-issorbit-2", "shape": "mcq", "tags": [ "iss", "orbit-period" ], "prompt": { "modality": "text", "value": "About how long does the ISS take to complete one full orbit of Earth?" }, "options": [ { "modality": "text", "value": "About 90 minutes" }, { "modality": "text", "value": "About 45 minutes" }, { "modality": "text", "value": "About 24 hours" }, { "modality": "text", "value": "About 3 hours" } ], "correctIndex": 0, "explanation": "The ISS circles Earth roughly every 90 minutes. The 45-minute figure is the gap between sunrises and sunsets — half an orbit — not a full loop.", "source": { "label": "Fun with Numbers — Objective Test" }, "uid": "19jlesvw5liy7" }, { "id": "ot-issorbit-3", "shape": "mcq", "tags": [ "iss", "sunrise" ], "prompt": { "modality": "text", "value": "About how often do ISS astronauts witness a sunrise or a sunset?" }, "options": [ { "modality": "text", "value": "Once a day" }, { "modality": "text", "value": "Every 90 minutes" }, { "modality": "text", "value": "Every 12 hours" }, { "modality": "text", "value": "Every 45 minutes" } ], "correctIndex": 3, "explanation": "Because a full orbit takes about 90 minutes, astronauts see a sunrise or sunset about every 45 minutes — roughly 16 of each per day.", "source": { "label": "Fun with Numbers — Objective Test" }, "uid": "1rnk78z1d2d9eb" }, { "id": "ot-issorbit-4", "shape": "mcq", "tags": [ "iss", "sunrise", "count" ], "prompt": { "modality": "text", "value": "About how many sunrises do ISS astronauts see in a single day?" }, "options": [ { "modality": "text", "value": "About 1" }, { "modality": "text", "value": "About 24" }, { "modality": "text", "value": "About 16" }, { "modality": "text", "value": "About 8" } ], "correctIndex": 2, "explanation": "Orbiting every 90 minutes, the ISS crew sees about 16 sunrises (and 16 sunsets) each day — one roughly every 45 minutes.", "source": { "label": "Fun with Numbers — Objective Test" }, "uid": "1jty10k1kh9mdm" }, { "id": "ot-maggiant-1", "shape": "mcq", "tags": [ "magnitude", "definition" ], "prompt": { "modality": "text", "value": "In astronomy, what does 'magnitude' measure?" }, "options": [ { "modality": "text", "value": "Orbital speed" }, { "modality": "text", "value": "Temperature" }, { "modality": "text", "value": "Distance" }, { "modality": "text", "value": "Size or brightness" } ], "correctIndex": 3, "explanation": "Magnitude is a measure of size or brightness, often on a logarithmic scale. It does not measure distance, speed, or temperature.", "source": { "label": "Fun with Numbers — Objective Test" }, "uid": "2n6164146qf6q" }, { "id": "ot-maggiant-2", "shape": "mcq", "tags": [ "magnitude", "scale" ], "prompt": { "modality": "text", "value": "On the stellar magnitude scale, what does a LOWER number mean?" }, "options": [ { "modality": "text", "value": "A smaller star" }, { "modality": "text", "value": "A more distant star" }, { "modality": "text", "value": "A dimmer star" }, { "modality": "text", "value": "A brighter star" } ], "correctIndex": 3, "explanation": "The scale runs backward: a lower magnitude means a brighter star, so a first-magnitude star outshines a sixth-magnitude one.", "source": { "label": "Fun with Numbers — Objective Test" }, "uid": "bre5s31nhnlh5" }, { "id": "ot-maggiant-3", "shape": "mcq", "tags": [ "magnitude", "scale" ], "prompt": { "modality": "text", "value": "Which statement about the stellar magnitude scale is FALSE?" }, "options": [ { "modality": "text", "value": "A higher magnitude number means a brighter star" }, { "modality": "text", "value": "The scale is often logarithmic" }, { "modality": "text", "value": "Magnitude can describe a star's brightness" }, { "modality": "text", "value": "A first-magnitude star outshines a sixth-magnitude one" } ], "correctIndex": 0, "explanation": "The scale runs backward, so a HIGHER number means a dimmer star, not a brighter one. Magnitude does describe brightness, it is often logarithmic, and first-magnitude outshines sixth.", "source": { "label": "Fun with Numbers — Objective Test" }, "uid": "1f5xvff131hqov" }, { "id": "ot-maggiant-4", "shape": "mcq", "tags": [ "sun", "largest" ], "prompt": { "modality": "text", "value": "What is the largest body in the solar system, at about 864,000 miles across?" }, "options": [ { "modality": "text", "value": "The Moon" }, { "modality": "text", "value": "Jupiter" }, { "modality": "text", "value": "Earth" }, { "modality": "text", "value": "The Sun" } ], "correctIndex": 3, "explanation": "The Sun, about 864,000 miles across, dwarfs everything else — over a million Earths would fit inside. Jupiter is the largest planet but far smaller than the Sun.", "source": { "label": "Fun with Numbers — Objective Test" }, "uid": "1st60ge1yic8g6" }, { "id": "ot-maggiant-5", "shape": "mcq", "tags": [ "jupiter", "largest-planet" ], "prompt": { "modality": "text", "value": "Which is the largest planet in the solar system, spanning about 86,900 miles?" }, "options": [ { "modality": "text", "value": "Saturn" }, { "modality": "text", "value": "Neptune" }, { "modality": "text", "value": "Earth" }, { "modality": "text", "value": "Jupiter" } ], "correctIndex": 3, "explanation": "Jupiter is the largest planet at about 86,900 miles across. Saturn, Neptune, and Earth are all smaller; the Sun is larger still but is a star, not a planet.", "source": { "label": "Fun with Numbers — Objective Test" }, "uid": "17cb0tpp1s0yp" }, { "id": "ot-natscale-debt", "shape": "mcq", "tags": [ "national-debt", "scale" ], "prompt": { "modality": "text", "value": "About how large was the US national debt by mid-2026?" }, "options": [ { "modality": "text", "value": "$6.4 trillion" }, { "modality": "text", "value": "$38.9 trillion" }, { "modality": "text", "value": "$110 trillion" }, { "modality": "text", "value": "$30.8 trillion" } ], "correctIndex": 1, "explanation": "The US national debt reached roughly $38.9 trillion. $30.8T is US GDP, $6.4T is the federal budget, and $110T is world GDP.", "source": { "label": "Fun with Numbers — Objective Test" }, "uid": "hqxf4g1fxkq94" }, { "id": "ot-natscale-worldgdp", "shape": "mcq", "tags": [ "world-gdp", "scale" ], "prompt": { "modality": "text", "value": "Roughly how large is total world GDP?" }, "options": [ { "modality": "text", "value": "$38.9 trillion" }, { "modality": "text", "value": "$5.2 trillion" }, { "modality": "text", "value": "$30.8 trillion" }, { "modality": "text", "value": "$110 trillion" } ], "correctIndex": 3, "explanation": "World GDP is about $110 trillion, with the US (about $30.8T) making up more than a quarter of it.", "source": { "label": "Fun with Numbers — Objective Test" }, "uid": "1s0u6ugibnjus" }, { "id": "ot-natscale-budget", "shape": "mcq", "tags": [ "federal-budget", "scale" ], "prompt": { "modality": "text", "value": "About how much does the US federal government spend in a single year?" }, "options": [ { "modality": "text", "value": "$800 billion" }, { "modality": "text", "value": "$110 trillion" }, { "modality": "text", "value": "$30.8 trillion" }, { "modality": "text", "value": "$6.4 trillion" } ], "correctIndex": 3, "explanation": "US federal budget outlays run about $6.4 trillion a year. $30.8T is total US GDP and $110T is world GDP.", "source": { "label": "Fun with Numbers — Objective Test" }, "uid": "1nz49ca1tt2mg2" }, { "id": "ot-natscale-rank", "shape": "mcq", "tags": [ "compare", "scale" ], "prompt": { "modality": "text", "value": "Which of these figures is the LARGEST?" }, "options": [ { "modality": "text", "value": "US federal budget" }, { "modality": "text", "value": "US GDP" }, { "modality": "text", "value": "World GDP" }, { "modality": "text", "value": "US national debt" } ], "correctIndex": 2, "explanation": "World GDP (~$110T) dwarfs the others: US debt ~$38.9T, US GDP ~$30.8T, and the federal budget ~$6.4T.", "source": { "label": "Fun with Numbers — Objective Test" }, "uid": "erge8d1hby8v5" }, { "id": "ot-gdp-acronym", "shape": "mcq", "tags": [ "gdp", "definition" ], "prompt": { "modality": "text", "value": "What does the acronym GDP stand for?" }, "options": [ { "modality": "text", "value": "Gross domestic product" }, { "modality": "text", "value": "Global domestic production" }, { "modality": "text", "value": "General debt product" }, { "modality": "text", "value": "Gross domestic profit" } ], "correctIndex": 0, "explanation": "GDP stands for gross domestic product — the total value of goods and services a country produces in a year.", "source": { "label": "Fun with Numbers — Objective Test" }, "uid": "9gvwxhr83m33" }, { "id": "ot-gdp-measures", "shape": "mcq", "tags": [ "gdp", "definition" ], "prompt": { "modality": "text", "value": "What does GDP measure?" }, "options": [ { "modality": "text", "value": "The net worth of a country's richest person", "short": "Net worth of its richest person" }, { "modality": "text", "value": "The total value of goods and services a country produces in a year", "short": "Goods & services made in a year" }, { "modality": "text", "value": "The total debt a country owes", "short": "The total debt a country owes" }, { "modality": "text", "value": "A government's accumulated spending over decades", "short": "Government spending over decades" } ], "correctIndex": 1, "explanation": "GDP is the total value of goods and services a country produces in a year — a measure of output, not debt or wealth.", "source": { "label": "Fun with Numbers — Objective Test" }, "uid": "1bei3zo2kv02u" }, { "id": "ot-gdp-largest", "shape": "mcq", "tags": [ "gdp", "usa" ], "prompt": { "modality": "text", "value": "Which country has the world's largest GDP?" }, "options": [ { "modality": "text", "value": "The United States" }, { "modality": "text", "value": "China" }, { "modality": "text", "value": "Japan" }, { "modality": "text", "value": "Germany" } ], "correctIndex": 0, "explanation": "The United States has the world's largest GDP, above $25 trillion and making up more than a quarter of world GDP.", "source": { "label": "Fun with Numbers — Objective Test" }, "uid": "1a9kc801ivxx32" }, { "id": "ot-gdp-period", "shape": "mcq", "tags": [ "gdp", "period" ], "prompt": { "modality": "text", "value": "Over what time period is a country's GDP measured?" }, "options": [ { "modality": "text", "value": "One decade" }, { "modality": "text", "value": "One year" }, { "modality": "text", "value": "One month" }, { "modality": "text", "value": "A single day" } ], "correctIndex": 1, "explanation": "GDP measures the value of goods and services produced in a year — an annual figure.", "source": { "label": "Fun with Numbers — Objective Test" }, "uid": "10cdeo5ppjzg" }, { "id": "ot-gdp-not", "shape": "mcq", "tags": [ "gdp", "debt" ], "prompt": { "modality": "text", "value": "Which of the following is NOT something GDP measures?" }, "options": [ { "modality": "text", "value": "A country's accumulated national debt" }, { "modality": "text", "value": "The value of goods a country produces" }, { "modality": "text", "value": "A country's yearly economic output" }, { "modality": "text", "value": "The value of services a country produces" } ], "correctIndex": 0, "explanation": "GDP measures a year's output of goods and services. Accumulated national debt is a separate figure that builds up over many years.", "source": { "label": "Fun with Numbers — Objective Test" }, "uid": "4452wby7b9e5" }, { "id": "ot-wealth-company", "shape": "mcq", "tags": [ "nvidia", "company" ], "prompt": { "modality": "text", "value": "As of 2026, what is the most valuable public company on Earth?" }, "options": [ { "modality": "text", "value": "Nvidia" }, { "modality": "text", "value": "Microsoft" }, { "modality": "text", "value": "Apple" }, { "modality": "text", "value": "Saudi Aramco" } ], "correctIndex": 0, "explanation": "Nvidia is the most valuable public company, the first ever to cross $5 trillion, driven by demand for AI chips.", "source": { "label": "Fun with Numbers — Objective Test" }, "uid": "1n2ojjn1rxoodj" }, { "id": "ot-wealth-nvidia-val", "shape": "mcq", "tags": [ "nvidia", "scale" ], "prompt": { "modality": "text", "value": "About how much is Nvidia, the most valuable public company, worth in 2026?" }, "options": [ { "modality": "text", "value": "$5.2 trillion" }, { "modality": "text", "value": "$13 billion" }, { "modality": "text", "value": "$800 billion" }, { "modality": "text", "value": "$407,600" } ], "correctIndex": 0, "explanation": "Nvidia is worth about $5.2 trillion — the first company ever to cross $5 trillion. $800B is Elon Musk's net worth.", "source": { "label": "Fun with Numbers — Objective Test" }, "uid": "6m6a8a9gkf6o" }, { "id": "ot-wealth-richest", "shape": "mcq", "tags": [ "musk", "net-worth" ], "prompt": { "modality": "text", "value": "Roughly what is the net worth of the world's richest person, Elon Musk (2026)?" }, "options": [ { "modality": "text", "value": "$5.2 trillion" }, { "modality": "text", "value": "$13 billion" }, { "modality": "text", "value": "$800 billion" }, { "modality": "text", "value": "$38.9 trillion" } ], "correctIndex": 2, "explanation": "Elon Musk's net worth is around $800 billion. $5.2T is Nvidia's value; it would take over 1,000 billionaires to equal a trillion.", "source": { "label": "Fun with Numbers — Objective Test" }, "uid": "14kzy1egk28ew" }, { "id": "ot-wealth-home", "shape": "mcq", "tags": [ "home", "everyday-cost" ], "prompt": { "modality": "text", "value": "What is the approximate median price of an existing US home in 2026?" }, "options": [ { "modality": "text", "value": "$650,000" }, { "modality": "text", "value": "$407,600" }, { "modality": "text", "value": "$250,000" }, { "modality": "text", "value": "$1.2 million" } ], "correctIndex": 1, "explanation": "The median US home sells for about $407,600 — a figure that feels almost quaint next to trillion-dollar economic numbers.", "source": { "label": "Fun with Numbers — Objective Test" }, "uid": "yk44xh1k0dend" }, { "id": "ot-wealth-carrier", "shape": "mcq", "tags": [ "carrier", "everyday-cost" ], "prompt": { "modality": "text", "value": "About how much does a Gerald R. Ford-class aircraft carrier cost?" }, "options": [ { "modality": "text", "value": "$407,600" }, { "modality": "text", "value": "$13 billion" }, { "modality": "text", "value": "$800 billion" }, { "modality": "text", "value": "$5.2 trillion" } ], "correctIndex": 1, "explanation": "A Ford-class carrier costs about $13 billion — one of the most expensive machines ever built, yet less than a day of national borrowing.", "source": { "label": "Fun with Numbers — Objective Test" }, "uid": "89o77jygn7st" }, { "id": "ot-agg-annual", "shape": "mcq", "tags": [ "gdp", "aggregates" ], "prompt": { "modality": "text", "value": "Which figure measures a country's economic output in a single year?" }, "options": [ { "modality": "text", "value": "Net worth" }, { "modality": "text", "value": "GDP" }, { "modality": "text", "value": "Market capitalization" }, { "modality": "text", "value": "National debt" } ], "correctIndex": 1, "explanation": "GDP measures a year's output. National debt is a cumulative total, while net worth and market cap apply to people or companies.", "source": { "label": "Fun with Numbers — Objective Test" }, "uid": "3mrtwn1e5vo4x" }, { "id": "ot-agg-debt-vs-output", "shape": "mcq", "tags": [ "debt", "gdp", "compare" ], "prompt": { "modality": "text", "value": "How does the US national debt compare with a full year of US economic output (GDP)?" }, "options": [ { "modality": "text", "value": "It equals exactly one year of output" }, { "modality": "text", "value": "It is far smaller than one year's output" }, { "modality": "text", "value": "It is about half of one year's output" }, { "modality": "text", "value": "It exceeds a full year of output" } ], "correctIndex": 3, "explanation": "US debt (~$38.9T) now exceeds a full year of US GDP (~$30.8T).", "source": { "label": "Fun with Numbers — Objective Test" }, "uid": "fm0g8lbj0um5" }, { "id": "ot-agg-budget-def", "shape": "mcq", "tags": [ "budget", "aggregates" ], "prompt": { "modality": "text", "value": "The US federal budget of about $6.4 trillion represents what?" }, "options": [ { "modality": "text", "value": "The government's total net worth" }, { "modality": "text", "value": "The total accumulated national debt" }, { "modality": "text", "value": "The value of all goods the country produces" }, { "modality": "text", "value": "The government's annual spending" } ], "correctIndex": 3, "explanation": "The federal budget (~$6.4T) is annual spending — distinct from the accumulated national debt (~$38.9T) and from GDP (~$30.8T).", "source": { "label": "Fun with Numbers — Objective Test" }, "uid": "1c17ufd1xmpusj" }, { "id": "ot-agg-debt-cumulative", "shape": "mcq", "tags": [ "debt", "aggregates" ], "prompt": { "modality": "text", "value": "Which statement best describes the national debt, unlike GDP?" }, "options": [ { "modality": "text", "value": "The value produced in a single year" }, { "modality": "text", "value": "A company's market value" }, { "modality": "text", "value": "An accumulated total built up over many years" }, { "modality": "text", "value": "A monthly spending figure" } ], "correctIndex": 2, "explanation": "National debt is a cumulative total that has built up over many years, whereas GDP measures output in a single year.", "source": { "label": "Fun with Numbers — Objective Test" }, "uid": "1n6mp8pg6qvd1" }, { "id": "ot-agg-not-aggregate", "shape": "mcq", "tags": [ "aggregates", "distinguish" ], "prompt": { "modality": "text", "value": "Which of these is NOT one of the major national economic aggregates discussed?" }, "options": [ { "modality": "text", "value": "The US federal budget" }, { "modality": "text", "value": "The median price of a home" }, { "modality": "text", "value": "US GDP" }, { "modality": "text", "value": "The US national debt" } ], "correctIndex": 1, "explanation": "GDP, the federal budget, and national debt are national economic aggregates. A median home price is an everyday cost, not an aggregate.", "source": { "label": "Fun with Numbers — Objective Test" }, "uid": "i5kgnys4kx5e" }, { "id": "ot-congress-senators", "shape": "mcq", "tags": [ "senate", "congress" ], "prompt": { "modality": "text", "value": "How many senators serve in the US Senate?" }, "options": [ { "modality": "text", "value": "100" }, { "modality": "text", "value": "435" }, { "modality": "text", "value": "538" }, { "modality": "text", "value": "50" } ], "correctIndex": 0, "explanation": "The Senate has 100 members — two from each of the 50 states. 435 is the House, and 538 is the total Electoral College.", "source": { "label": "Fun with Numbers — Objective Test" }, "uid": "ork521vx8mwc" }, { "id": "ot-congress-house-body", "shape": "mcq", "tags": [ "house", "congress" ], "prompt": { "modality": "text", "value": "Which US governing body has 435 voting members?" }, "options": [ { "modality": "text", "value": "The Supreme Court" }, { "modality": "text", "value": "The Electoral College" }, { "modality": "text", "value": "The Senate" }, { "modality": "text", "value": "The House of Representatives" } ], "correctIndex": 3, "explanation": "The House of Representatives has 435 voting members, capped by a 1911 law. The Senate has 100, and the Electoral College has 538.", "source": { "label": "Fun with Numbers — Objective Test" }, "uid": "19huff51we85r3" }, { "id": "ot-congress-ev-win", "shape": "mcq", "tags": [ "electoral-college" ], "prompt": { "modality": "text", "value": "How many electoral votes does a candidate need to win the US presidency?" }, "options": [ { "modality": "text", "value": "435" }, { "modality": "text", "value": "218" }, { "modality": "text", "value": "538" }, { "modality": "text", "value": "270" } ], "correctIndex": 3, "explanation": "A candidate needs 270 electoral votes — a majority of the 538 total. 538 is the total, not the threshold to win.", "source": { "label": "Fun with Numbers — Objective Test" }, "uid": "1b9wrk2khtu88" }, { "id": "ot-congress-ev-total", "shape": "mcq", "tags": [ "electoral-college" ], "prompt": { "modality": "text", "value": "The 270 votes needed to win come out of how many total electoral votes?" }, "options": [ { "modality": "text", "value": "435" }, { "modality": "text", "value": "545" }, { "modality": "text", "value": "538" }, { "modality": "text", "value": "500" } ], "correctIndex": 2, "explanation": "There are 538 total electoral votes, so 270 is a bare majority. 435 is the size of the House, not the Electoral College.", "source": { "label": "Fun with Numbers — Objective Test" }, "uid": "609nh71ugw1dp" }, { "id": "ot-pres-count", "shape": "mcq", "tags": [ "presidents" ], "prompt": { "modality": "text", "value": "How many US presidents have there been through 2026?" }, "options": [ { "modality": "text", "value": "47" }, { "modality": "text", "value": "44" }, { "modality": "text", "value": "45" }, { "modality": "text", "value": "46" } ], "correctIndex": 0, "explanation": "As of 2026 the count is 47, because Donald Trump holds both the 45th and 47th slots after non-consecutive terms.", "source": { "label": "Fun with Numbers — Objective Test" }, "uid": "1betu5my2e3es" }, { "id": "ot-pres-term", "shape": "mcq", "tags": [ "presidency", "term" ], "prompt": { "modality": "text", "value": "How many years is a single US presidential term?" }, "options": [ { "modality": "text", "value": "4" }, { "modality": "text", "value": "8" }, { "modality": "text", "value": "2" }, { "modality": "text", "value": "6" } ], "correctIndex": 0, "explanation": "A presidential term is 4 years. 2 is a House term, 6 is a Senate term, and 8 is the two-term maximum.", "source": { "label": "Fun with Numbers — Objective Test" }, "uid": "ols8q11ldkvop" }, { "id": "ot-const-ratified", "shape": "mcq", "tags": [ "constitution" ], "prompt": { "modality": "text", "value": "In what year was the US Constitution ratified?" }, "options": [ { "modality": "text", "value": "1788" }, { "modality": "text", "value": "1776" }, { "modality": "text", "value": "1787" }, { "modality": "text", "value": "1789" } ], "correctIndex": 0, "explanation": "The Constitution was ratified in 1788, when New Hampshire became the ninth state to ratify it (June 21, 1788), meeting Article VII's nine-state threshold. Government under it began in 1789; 1787 is when it was drafted and signed; 1776 is the Declaration of Independence.", "source": { "label": "Fun with Numbers — Objective Test" }, "uid": "1hh2j1d1kv7iyd" }, { "id": "ot-const-amendments", "shape": "mcq", "tags": [ "constitution", "amendments" ], "prompt": { "modality": "text", "value": "How many times has the US Constitution been formally amended?" }, "options": [ { "modality": "text", "value": "10" }, { "modality": "text", "value": "27" }, { "modality": "text", "value": "25" }, { "modality": "text", "value": "12" } ], "correctIndex": 1, "explanation": "There are 27 amendments; the first ten are the Bill of Rights. 10 counts only the Bill of Rights, not the total.", "source": { "label": "Fun with Numbers — Objective Test" }, "uid": "1j6nh0t18plerj" }, { "id": "ot-pres-nonconsec", "shape": "mcq", "tags": [ "presidents" ], "prompt": { "modality": "text", "value": "As of 2026, which president holds both the 45th and 47th slots because his terms were non-consecutive?" }, "options": [ { "modality": "text", "value": "Grover Cleveland" }, { "modality": "text", "value": "Joe Biden" }, { "modality": "text", "value": "Donald Trump" }, { "modality": "text", "value": "Barack Obama" } ], "correctIndex": 2, "explanation": "Donald Trump holds the 45th and 47th slots — a quirk of non-consecutive terms shared only with Grover Cleveland, who did it earlier.", "source": { "label": "Fun with Numbers — Objective Test" }, "uid": "ogykl2mgmsry" }, { "id": "ot-inst-electoral", "shape": "mcq", "tags": [ "electoral-college", "institutions" ], "prompt": { "modality": "text", "value": "Which US institution decides presidential elections through a total of 538 votes?" }, "options": [ { "modality": "text", "value": "The Senate" }, { "modality": "text", "value": "The Supreme Court" }, { "modality": "text", "value": "The Electoral College" }, { "modality": "text", "value": "The House of Representatives" } ], "correctIndex": 2, "explanation": "The Electoral College casts 538 votes, with 270 needed to win. The Senate and House are legislative bodies, not the election-deciding institution.", "source": { "label": "Fun with Numbers — Objective Test" }, "uid": "1uxgq8m18byqgm" }, { "id": "ot-inst-senate", "shape": "mcq", "tags": [ "senate", "institutions" ], "prompt": { "modality": "text", "value": "Which body of Congress gives two members to each state regardless of population?" }, "options": [ { "modality": "text", "value": "The Electoral College" }, { "modality": "text", "value": "The Senate" }, { "modality": "text", "value": "The House of Representatives" }, { "modality": "text", "value": "The Cabinet" } ], "correctIndex": 1, "explanation": "The Senate seats two per state (100 total). The House is apportioned by population, not equally by state.", "source": { "label": "Fun with Numbers — Objective Test" }, "uid": "1e1uvkp2n3tax" }, { "id": "ot-inst-constitution", "shape": "mcq", "tags": [ "constitution", "institutions" ], "prompt": { "modality": "text", "value": "What is the oldest written national constitution still in use, forming the framework of US government?" }, "options": [ { "modality": "text", "value": "The US Constitution" }, { "modality": "text", "value": "The Bill of Rights" }, { "modality": "text", "value": "The Declaration of Independence" }, { "modality": "text", "value": "The Articles of Confederation" } ], "correctIndex": 0, "explanation": "The US Constitution, ratified 1788, is the oldest written national constitution still in use. The Bill of Rights is its first ten amendments, not the whole document.", "source": { "label": "Fun with Numbers — Objective Test" }, "uid": "v9ssbo1xwc3us" }, { "id": "ot-inst-house", "shape": "mcq", "tags": [ "house", "institutions" ], "prompt": { "modality": "text", "value": "Which chamber of Congress has 435 voting members apportioned by population?" }, "options": [ { "modality": "text", "value": "The House of Lords" }, { "modality": "text", "value": "The Senate" }, { "modality": "text", "value": "The Electoral College" }, { "modality": "text", "value": "The House of Representatives" } ], "correctIndex": 3, "explanation": "The House of Representatives has 435 population-apportioned seats. The Senate has 100 seated equally by state; the House of Lords is British.", "source": { "label": "Fun with Numbers — Objective Test" }, "uid": "14flxvb171rc37" }, { "id": "ot-inst-not-institution", "shape": "mcq", "tags": [ "institutions" ], "prompt": { "modality": "text", "value": "Which of these is NOT a governing institution of the US federal government?" }, "options": [ { "modality": "text", "value": "The House of Representatives" }, { "modality": "text", "value": "The Electoral College" }, { "modality": "text", "value": "The National Park System" }, { "modality": "text", "value": "The Senate" } ], "correctIndex": 2, "explanation": "The Senate, House, and Electoral College are core governing institutions. The National Park System is a federal land agency, not a governing body.", "source": { "label": "Fun with Numbers — Objective Test" }, "uid": "wmk4h11bvil0d" }, { "id": "ot-flag-states", "shape": "mcq", "tags": [ "states", "flag" ], "prompt": { "modality": "text", "value": "How many states make up the United States?" }, "options": [ { "modality": "text", "value": "52" }, { "modality": "text", "value": "48" }, { "modality": "text", "value": "13" }, { "modality": "text", "value": "50" } ], "correctIndex": 3, "explanation": "There are 50 states, reached in 1959 when Alaska and Hawai'i joined. 13 is the number of original colonies, shown by the stripes.", "source": { "label": "Fun with Numbers — Objective Test" }, "uid": "rex530et3cam" }, { "id": "ot-flag-stars", "shape": "mcq", "tags": [ "flag", "stars" ], "prompt": { "modality": "text", "value": "How many stars appear on the US flag?" }, "options": [ { "modality": "text", "value": "50" }, { "modality": "text", "value": "48" }, { "modality": "text", "value": "63" }, { "modality": "text", "value": "13" } ], "correctIndex": 0, "explanation": "There are 50 stars, one per current state. The 13 stripes represent the original colonies, and 63 is the number of national parks.", "source": { "label": "Fun with Numbers — Objective Test" }, "uid": "1u1d4qkp9mguw" }, { "id": "ot-flag-stripes-count", "shape": "mcq", "tags": [ "flag", "stripes" ], "prompt": { "modality": "text", "value": "How many stripes are on the US flag?" }, "options": [ { "modality": "text", "value": "48" }, { "modality": "text", "value": "13" }, { "modality": "text", "value": "50" }, { "modality": "text", "value": "63" } ], "correctIndex": 1, "explanation": "There are 13 stripes, one per original colony, and they have stayed fixed while the 50 stars multiplied with each new state.", "source": { "label": "Fun with Numbers — Objective Test" }, "uid": "92dv1xhd9c4p" }, { "id": "ot-flag-parks", "shape": "mcq", "tags": [ "national-parks" ], "prompt": { "modality": "text", "value": "How many national parks does the US National Park System include as of 2026?" }, "options": [ { "modality": "text", "value": "58" }, { "modality": "text", "value": "50" }, { "modality": "text", "value": "63" }, { "modality": "text", "value": "419" } ], "correctIndex": 2, "explanation": "There are 63 national parks — crown jewels like Yellowstone and Yosemite — among hundreds of other protected sites. 419 counts all NPS units, not just parks.", "source": { "label": "Fun with Numbers — Objective Test" }, "uid": "1iyl44a1syplre" }, { "id": "ot-age-vote", "shape": "mcq", "tags": [ "voting-age" ], "prompt": { "modality": "text", "value": "What is the voting age in the United States?" }, "options": [ { "modality": "text", "value": "18" }, { "modality": "text", "value": "21" }, { "modality": "text", "value": "25" }, { "modality": "text", "value": "16" } ], "correctIndex": 0, "explanation": "You can vote at 18, lowered from 21 by the 26th Amendment. 21 was the old threshold before that amendment.", "source": { "label": "Fun with Numbers — Objective Test" }, "uid": "4i4aoj30uqln" }, { "id": "ot-age-pres", "shape": "mcq", "tags": [ "president", "age" ], "prompt": { "modality": "text", "value": "What is the minimum age to become US president?" }, "options": [ { "modality": "text", "value": "25" }, { "modality": "text", "value": "40" }, { "modality": "text", "value": "30" }, { "modality": "text", "value": "35" } ], "correctIndex": 3, "explanation": "You must be at least 35 to be president — one of just three constitutional qualifications for the office.", "source": { "label": "Fun with Numbers — Objective Test" }, "uid": "1nul45g16nkudo" }, { "id": "ot-age-which-amendment", "shape": "mcq", "tags": [ "voting-age", "amendments" ], "prompt": { "modality": "text", "value": "Which amendment lowered the US voting age to 18?" }, "options": [ { "modality": "text", "value": "The 26th Amendment" }, { "modality": "text", "value": "The 19th Amendment" }, { "modality": "text", "value": "The 27th Amendment" }, { "modality": "text", "value": "The 24th Amendment" } ], "correctIndex": 0, "explanation": "The 26th Amendment lowered the voting age from 21 to 18. The 19th Amendment gave women the vote — a different reform.", "source": { "label": "Fun with Numbers — Objective Test" }, "uid": "1ka4cdf1if4k1f" }, { "id": "ot-age-former", "shape": "mcq", "tags": [ "voting-age" ], "prompt": { "modality": "text", "value": "Before the 26th Amendment, what was the US voting age?" }, "options": [ { "modality": "text", "value": "19" }, { "modality": "text", "value": "25" }, { "modality": "text", "value": "21" }, { "modality": "text", "value": "18" } ], "correctIndex": 2, "explanation": "The voting age was 21 before the 26th Amendment lowered it to 18. 18 is the current age, not the former one.", "source": { "label": "Fun with Numbers — Objective Test" }, "uid": "1hrd6mp3vi7mx" }, { "id": "ot-age-diff", "shape": "mcq", "tags": [ "age", "president", "voting-age" ], "prompt": { "modality": "text", "value": "How many years older must a person be to run for president than to be eligible to vote?" }, "options": [ { "modality": "text", "value": "20" }, { "modality": "text", "value": "14" }, { "modality": "text", "value": "17" }, { "modality": "text", "value": "23" } ], "correctIndex": 2, "explanation": "The presidential minimum age is 35 and the voting age is 18, a gap of 17 years. Both are constitutional age thresholds.", "source": { "label": "Fun with Numbers — Objective Test" }, "uid": "10t2qbk1pj6izg" }, { "id": "ot-human-body-1", "shape": "mcq", "tags": [ "human body", "bones" ], "prompt": { "modality": "text", "value": "How many bones are in an average adult human body?" }, "options": [ { "modality": "text", "value": "206" }, { "modality": "text", "value": "220" }, { "modality": "text", "value": "212" }, { "modality": "text", "value": "198" } ], "correctIndex": 0, "explanation": "An adult body has 206 bones. A baby is born with around 300, many of which fuse together as the body grows, leaving 206 in adulthood.", "source": { "label": "Fun with Numbers — Objective Test" }, "uid": "17xjo3g1i8ztvm" }, { "id": "ot-human-body-2", "shape": "mcq", "tags": [ "human body", "heart" ], "prompt": { "modality": "text", "value": "About how many times does an average human heart beat in a single day?" }, "options": [ { "modality": "text", "value": "1,000,000" }, { "modality": "text", "value": "50,000" }, { "modality": "text", "value": "10,000" }, { "modality": "text", "value": "100,000" } ], "correctIndex": 3, "explanation": "The heart beats roughly 100,000 times a day with no scheduled maintenance break. 10,000 would be far too slow and 1,000,000 far too fast for a human pulse.", "source": { "label": "Fun with Numbers — Objective Test" }, "uid": "17httr4ho8i2y" }, { "id": "ot-human-body-3", "shape": "mcq", "tags": [ "human body", "heart" ], "prompt": { "modality": "text", "value": "Beating about 100,000 times a day, roughly how many times does a heart beat over an 80-year life?" }, "options": [ { "modality": "text", "value": "1 billion" }, { "modality": "text", "value": "30 billion" }, { "modality": "text", "value": "3 billion" }, { "modality": "text", "value": "300 million" } ], "correctIndex": 2, "explanation": "At ~100,000 beats a day across 80 years, the total is close to 3 billion beats. 300 million would cover only a few years, not a lifetime.", "source": { "label": "Fun with Numbers — Objective Test" }, "uid": "12vsunzxhyn7" }, { "id": "ot-human-body-4", "shape": "mcq", "tags": [ "human body", "bones" ], "prompt": { "modality": "text", "value": "A newborn has about 300 bones and an adult 206. Roughly how many fuse away during growth?" }, "options": [ { "modality": "text", "value": "About 150" }, { "modality": "text", "value": "About 44" }, { "modality": "text", "value": "About 94" }, { "modality": "text", "value": "About 200" } ], "correctIndex": 2, "explanation": "300 minus 206 leaves about 94 bones that fuse together over time, especially in the skull. The other values misjudge the difference between the two counts.", "source": { "label": "Fun with Numbers — Objective Test" }, "uid": "19mz58z1m58p7h" }, { "id": "ot-animal-records-1", "shape": "mcq", "tags": [ "animals", "cheetah" ], "prompt": { "modality": "text", "value": "In short bursts, roughly how fast can a cheetah run?" }, "options": [ { "modality": "text", "value": "50 miles per hour" }, { "modality": "text", "value": "70 miles per hour" }, { "modality": "text", "value": "90 miles per hour" }, { "modality": "text", "value": "120 miles per hour" } ], "correctIndex": 1, "explanation": "The cheetah tops out around 70 mph in short bursts, making it the fastest land animal. 50 undershoots and 90-120 exceed any land animal's real speed.", "source": { "label": "Fun with Numbers — Objective Test" }, "uid": "1s5irv0bb1eh8" }, { "id": "ot-animal-records-2", "shape": "mcq", "tags": [ "animals", "cheetah" ], "prompt": { "modality": "text", "value": "Which animal holds the record as the fastest thing on land?" }, "options": [ { "modality": "text", "value": "Lion" }, { "modality": "text", "value": "Cheetah" }, { "modality": "text", "value": "Pronghorn" }, { "modality": "text", "value": "Greyhound" } ], "correctIndex": 1, "explanation": "The cheetah is the fastest land animal at about 70 mph. Pronghorns, lions, and greyhounds are quick but none reach the cheetah's peak speed.", "source": { "label": "Fun with Numbers — Objective Test" }, "uid": "7pnv0mqe55no" }, { "id": "ot-animal-records-3", "shape": "mcq", "tags": [ "animals", "blue whale" ], "prompt": { "modality": "text", "value": "The blue whale, the largest animal ever, can weigh up to about how much?" }, "options": [ { "modality": "text", "value": "500 tons" }, { "modality": "text", "value": "100 tons" }, { "modality": "text", "value": "50 tons" }, { "modality": "text", "value": "200 tons" } ], "correctIndex": 3, "explanation": "A blue whale can weigh up to about 200 tons, heavier than the biggest dinosaurs. 50 or 100 tons undershoots and 500 tons is unrealistically high.", "source": { "label": "Fun with Numbers — Objective Test" }, "uid": "9o3m5qkcxu6e" }, { "id": "ot-animal-records-4", "shape": "mcq", "tags": [ "animals", "blue whale" ], "prompt": { "modality": "text", "value": "Which is the largest animal that has ever lived, heavier even than the biggest dinosaurs?" }, "options": [ { "modality": "text", "value": "African bush elephant" }, { "modality": "text", "value": "Colossal squid" }, { "modality": "text", "value": "Argentinosaurus" }, { "modality": "text", "value": "Blue whale" } ], "correctIndex": 3, "explanation": "The blue whale is the largest animal ever, outweighing the biggest dinosaurs like Argentinosaurus. Elephants and squid are far smaller.", "source": { "label": "Fun with Numbers — Objective Test" }, "uid": "1gm912gllkah4" }, { "id": "ot-animal-records-5", "shape": "mcq", "tags": [ "animals", "blue whale" ], "prompt": { "modality": "text", "value": "A blue whale's heart alone is roughly the size of what?" }, "options": [ { "modality": "text", "value": "A small car" }, { "modality": "text", "value": "A basketball" }, { "modality": "text", "value": "A refrigerator" }, { "modality": "text", "value": "A house cat" } ], "correctIndex": 0, "explanation": "A blue whale's heart is about the size of a small car, matching its 200-ton bulk. The other options vastly underestimate the scale of the largest animal ever.", "source": { "label": "Fun with Numbers — Objective Test" }, "uid": "1i4zcap1ndbk9b" }, { "id": "ot-human-extremes-1", "shape": "mcq", "tags": [ "human extremes", "diving" ], "prompt": { "modality": "text", "value": "About how deep is the deepest scuba dive ever recorded?" }, "options": [ { "modality": "text", "value": "2,000 feet" }, { "modality": "text", "value": "1,090 feet" }, { "modality": "text", "value": "500 feet" }, { "modality": "text", "value": "702 feet" } ], "correctIndex": 1, "explanation": "The deepest scuba dive reached about 1,090 feet, requiring years of planning and hours of ascent. 702 feet is the free-dive record, not the scuba record.", "source": { "label": "Fun with Numbers — Objective Test" }, "uid": "7kp2os4rv614" }, { "id": "ot-human-extremes-2", "shape": "mcq", "tags": [ "human extremes", "diving" ], "prompt": { "modality": "text", "value": "Holding a single breath on a weighted sled, free-divers have reached about how deep?" }, "options": [ { "modality": "text", "value": "702 feet" }, { "modality": "text", "value": "350 feet" }, { "modality": "text", "value": "900 feet" }, { "modality": "text", "value": "1,090 feet" } ], "correctIndex": 0, "explanation": "The no-limits free-dive record is about 702 feet on a weighted sled. 1,090 feet is the deepest scuba dive, which uses a breathing apparatus.", "source": { "label": "Fun with Numbers — Objective Test" }, "uid": "4iv5g916aokkd" }, { "id": "ot-human-extremes-3", "shape": "mcq", "tags": [ "human extremes", "temperature" ], "prompt": { "modality": "text", "value": "What is the highest air temperature ever reliably recorded on Earth?" }, "options": [ { "modality": "text", "value": "108°F" }, { "modality": "text", "value": "134°F" }, { "modality": "text", "value": "150°F" }, { "modality": "text", "value": "120°F" } ], "correctIndex": 1, "explanation": "The highest reliably recorded air temperature was 134°F in Death Valley, California, hot enough to cook an egg on the ground. The other values are too low or too high.", "source": { "label": "Fun with Numbers — Objective Test" }, "uid": "6wae5g9apgoy" }, { "id": "ot-human-extremes-4", "shape": "mcq", "tags": [ "human extremes", "temperature" ], "prompt": { "modality": "text", "value": "Where was the highest reliably recorded air temperature of 134°F measured?" }, "options": [ { "modality": "text", "value": "The Sahara Desert" }, { "modality": "text", "value": "Death Valley, California" }, { "modality": "text", "value": "Dubai, UAE" }, { "modality": "text", "value": "Lut Desert, Iran" } ], "correctIndex": 1, "explanation": "The record 134°F was measured in Death Valley, California. The Sahara and Lut Desert are hot but did not set this reliably recorded air-temperature record.", "source": { "label": "Fun with Numbers — Objective Test" }, "uid": "1nf4fix6dd2ur" }, { "id": "ot-human-extremes-5", "shape": "mcq", "tags": [ "human extremes", "sprint speed" ], "prompt": { "modality": "text", "value": "About how fast was Usain Bolt going at his peak during his 100 m world record?" }, "options": [ { "modality": "text", "value": "19.9 miles per hour" }, { "modality": "text", "value": "27.8 miles per hour" }, { "modality": "text", "value": "23.5 miles per hour" }, { "modality": "text", "value": "31.2 miles per hour" } ], "correctIndex": 1, "explanation": "Bolt hit about 27.8 mph for a few strides, the fastest a human has run under their own power. The other values under- or over-state his peak sprint speed.", "source": { "label": "Fun with Numbers — Objective Test" }, "uid": "hvbktn1r3j38b" }, { "id": "ot-wingspan-def", "shape": "mcq", "tags": [ "wingspan", "definition" ], "prompt": { "modality": "text", "value": "What does the term wingspan measure?" }, "options": [ { "modality": "text", "value": "The distance from one wingtip to the other" }, { "modality": "text", "value": "The bird's height when standing" }, { "modality": "text", "value": "The total number of flight feathers" }, { "modality": "text", "value": "The length from beak to tail" } ], "correctIndex": 0, "explanation": "Wingspan is the distance from one wingtip to the other. It measures side-to-side reach across the outstretched wings, not body length, height, or feather count.", "source": { "label": "Fun with Numbers — Objective Test" }, "uid": "edydx5my5239" }, { "id": "ot-wingspan-holder", "shape": "mcq", "tags": [ "wingspan", "albatross" ], "prompt": { "modality": "text", "value": "Which living bird has the largest wingspan?" }, "options": [ { "modality": "text", "value": "Andean condor" }, { "modality": "text", "value": "Bald eagle" }, { "modality": "text", "value": "Wandering albatross" }, { "modality": "text", "value": "California condor" } ], "correctIndex": 2, "explanation": "The wandering albatross has the largest wingspan of any living bird, stretching beyond three metres. Eagles and condors have impressive but smaller wingspans.", "source": { "label": "Fun with Numbers — Objective Test" }, "uid": "e3c3l61q6nino" }, { "id": "ot-wingspan-metres", "shape": "mcq", "tags": [ "wingspan", "albatross" ], "prompt": { "modality": "text", "value": "The wandering albatross's record wingspan stretches beyond how many metres?" }, "options": [ { "modality": "text", "value": "Five" }, { "modality": "text", "value": "Three" }, { "modality": "text", "value": "One" }, { "modality": "text", "value": "Two" } ], "correctIndex": 1, "explanation": "Its wingspan stretches beyond three metres, the largest of any living bird. Two metres understates the record and five metres overstates it.", "source": { "label": "Fun with Numbers — Objective Test" }, "uid": "f01n7y1y5dxgs" }, { "id": "ot-wingspan-not", "shape": "mcq", "tags": [ "wingspan", "albatross" ], "prompt": { "modality": "text", "value": "Which statement about the wandering albatross is NOT correct?" }, "options": [ { "modality": "text", "value": "It has the smallest wingspan of any bird" }, { "modality": "text", "value": "Its wingspan stretches beyond three metres" }, { "modality": "text", "value": "It has the largest wingspan of any living bird" }, { "modality": "text", "value": "Wingspan is measured from wingtip to wingtip" } ], "correctIndex": 0, "explanation": "The albatross has the LARGEST wingspan of any living bird, not the smallest, so that statement is incorrect. The other three statements are all accurate.", "source": { "label": "Fun with Numbers — Objective Test" }, "uid": "sls7m91svmvr7" }, { "id": "ot-wingspan-apply", "shape": "mcq", "tags": [ "wingspan", "apply" ], "prompt": { "modality": "text", "value": "A bird's outstretched wings measure 3.5 metres from tip to tip. That measurement is its what?" }, "options": [ { "modality": "text", "value": "Height" }, { "modality": "text", "value": "Tail span" }, { "modality": "text", "value": "Wingspan" }, { "modality": "text", "value": "Body length" } ], "correctIndex": 2, "explanation": "Tip-to-tip distance across the wings is the wingspan. Body length runs beak to tail, height is a standing measure, and tail span refers only to the tail.", "source": { "label": "Fun with Numbers — Objective Test" }, "uid": "1vlm3v51woch2r" }, { "id": "ot-phys-tallest-mtn", "shape": "mcq", "tags": [ "mountains", "superlatives" ], "prompt": { "modality": "text", "value": "Which peak holds the record as the tallest mountain on Earth, at 29,032 feet?" }, "options": [ { "modality": "text", "value": "Mount Kilimanjaro" }, { "modality": "text", "value": "Denali" }, { "modality": "text", "value": "Mount Everest" }, { "modality": "text", "value": "K2" } ], "correctIndex": 2, "explanation": "Mount Everest is the tallest mountain at 29,032 ft. K2, Denali, and Kilimanjaro are all famous peaks but none reaches Everest's height.", "source": { "label": "Fun with Numbers — Objective Test" }, "uid": "k2lpk1196uxv" }, { "id": "ot-phys-deepest-ocean", "shape": "mcq", "tags": [ "ocean", "superlatives" ], "prompt": { "modality": "text", "value": "What is the deepest point in the ocean, reaching about 35,900 feet down?" }, "options": [ { "modality": "text", "value": "The Mariana Trench" }, { "modality": "text", "value": "The Puerto Rico Trench" }, { "modality": "text", "value": "The Tonga Trench" }, { "modality": "text", "value": "The Java Trench" } ], "correctIndex": 0, "explanation": "The Mariana Trench plunges to roughly 35,900 ft, the deepest point in any ocean. The others are deep trenches too but far shallower.", "source": { "label": "Fun with Numbers — Objective Test" }, "uid": "18z1a1ba6km9" }, { "id": "ot-phys-longest-river", "shape": "mcq", "tags": [ "rivers", "superlatives" ], "prompt": { "modality": "text", "value": "Which river is the longest, at roughly 4,130 miles?" }, "options": [ { "modality": "text", "value": "The Amazon" }, { "modality": "text", "value": "The Mississippi" }, { "modality": "text", "value": "The Yangtze" }, { "modality": "text", "value": "The Nile" } ], "correctIndex": 3, "explanation": "The Nile, about 4,130 miles, is the longest river. The Amazon, Yangtze, and Mississippi are major rivers but shorter by this measure.", "source": { "label": "Fun with Numbers — Objective Test" }, "uid": "1gicjq9pxa" }, { "id": "ot-phys-not-paired", "shape": "mcq", "tags": [ "buildings", "superlatives" ], "prompt": { "modality": "text", "value": "Which record-holder pairing is NOT correct?" }, "options": [ { "modality": "text", "value": "Longest river — the Nile" }, { "modality": "text", "value": "Deepest ocean point — the Mariana Trench" }, { "modality": "text", "value": "Tallest building — the Burj Khalifa" }, { "modality": "text", "value": "Tallest building — the Eiffel Tower" } ], "correctIndex": 3, "explanation": "The tallest building is the Burj Khalifa at 2,717 ft, not the Eiffel Tower. The other three pairings are all correct.", "source": { "label": "Fun with Numbers — Objective Test" }, "uid": "89g2zaqh2aei" }, { "id": "ot-geo-largest-country", "shape": "mcq", "tags": [ "countries", "superlatives" ], "prompt": { "modality": "text", "value": "Which nation is the largest country by area, about 6.6 million square miles?" }, "options": [ { "modality": "text", "value": "Russia" }, { "modality": "text", "value": "China" }, { "modality": "text", "value": "Canada" }, { "modality": "text", "value": "The United States" } ], "correctIndex": 0, "explanation": "Russia is the largest country by area at roughly 6.6 million sq mi. Canada, China, and the US are large but all smaller.", "source": { "label": "Fun with Numbers — Objective Test" }, "uid": "1t09bk2g23bro" }, { "id": "ot-geo-most-populous", "shape": "mcq", "tags": [ "population", "superlatives" ], "prompt": { "modality": "text", "value": "Which country is now the most populous, with about 1.43 billion people?" }, "options": [ { "modality": "text", "value": "Indonesia" }, { "modality": "text", "value": "India" }, { "modality": "text", "value": "China" }, { "modality": "text", "value": "The United States" } ], "correctIndex": 1, "explanation": "India is now the most populous country at about 1.43 billion people, having passed China. The US and Indonesia are far behind.", "source": { "label": "Fun with Numbers — Objective Test" }, "uid": "1wr9v9j1t9cvv1" }, { "id": "ot-geo-presidents", "shape": "mcq", "tags": [ "presidents", "superlatives" ], "prompt": { "modality": "text", "value": "How many US presidents has the country had through 2026?" }, "options": [ { "modality": "text", "value": "47" }, { "modality": "text", "value": "46" }, { "modality": "text", "value": "45" }, { "modality": "text", "value": "48" } ], "correctIndex": 0, "explanation": "The US has had 47 presidents through 2026. The count reaches 47 even though Trump is counted as both the 45th and 47th.", "source": { "label": "Fun with Numbers — Objective Test" }, "uid": "1uoezjc9cq5ku" }, { "id": "ot-geo-trump-count", "shape": "mcq", "tags": [ "presidents", "superlatives" ], "prompt": { "modality": "text", "value": "Why does the US presidential count reach 47 by 2026?" }, "options": [ { "modality": "text", "value": "The count skips a number for an acting president" }, { "modality": "text", "value": "Trump is counted as both the 45th and 47th president" }, { "modality": "text", "value": "Two presidents served at the same time" }, { "modality": "text", "value": "One president was never officially numbered" } ], "correctIndex": 1, "explanation": "Trump is counted as both the 45th and 47th president because his terms were non-consecutive, which is why the total is 47.", "source": { "label": "Fun with Numbers — Objective Test" }, "uid": "bfzj051w1cevr" }, { "id": "ot-geo-not-paired", "shape": "mcq", "tags": [ "countries", "superlatives" ], "prompt": { "modality": "text", "value": "Which geopolitical record pairing is NOT correct?" }, "options": [ { "modality": "text", "value": "Most populous country — India" }, { "modality": "text", "value": "Largest country by area — Russia" }, { "modality": "text", "value": "US presidents through 2026 — 47" }, { "modality": "text", "value": "Most populous country — China" } ], "correctIndex": 3, "explanation": "India, not China, is now the most populous country at about 1.43 billion. The other three pairings are all correct.", "source": { "label": "Fun with Numbers — Objective Test" }, "uid": "1xnt1h790527v" }, { "id": "ot-sci-closest-star", "shape": "mcq", "tags": [ "astronomy", "superlatives" ], "prompt": { "modality": "text", "value": "What is the closest star to Earth, about 93 million miles away?" }, "options": [ { "modality": "text", "value": "The Sun" }, { "modality": "text", "value": "Proxima Centauri" }, { "modality": "text", "value": "Sirius" }, { "modality": "text", "value": "Alpha Centauri" } ], "correctIndex": 0, "explanation": "The Sun is the closest star to Earth, about 93 million miles away. Proxima Centauri is the next-nearest but light-years off.", "source": { "label": "Fun with Numbers — Objective Test" }, "uid": "1h9wuor1cpy4ej" }, { "id": "ot-sci-fastest-animal", "shape": "mcq", "tags": [ "animals", "superlatives" ], "prompt": { "modality": "text", "value": "Which animal is the fastest on land, reaching about 70 mph?" }, "options": [ { "modality": "text", "value": "The greyhound" }, { "modality": "text", "value": "The lion" }, { "modality": "text", "value": "The cheetah" }, { "modality": "text", "value": "The pronghorn" } ], "correctIndex": 2, "explanation": "The cheetah is the fastest land animal at about 70 mph. The pronghorn, lion, and greyhound are fast but slower.", "source": { "label": "Fun with Numbers — Objective Test" }, "uid": "1s5xo3h1tay0kp" }, { "id": "ot-sci-valuable-co", "shape": "mcq", "tags": [ "economy", "superlatives" ], "prompt": { "modality": "text", "value": "Which is the most valuable public company, worth about $5 trillion on the AI boom?" }, "options": [ { "modality": "text", "value": "Saudi Aramco" }, { "modality": "text", "value": "Microsoft" }, { "modality": "text", "value": "Nvidia" }, { "modality": "text", "value": "Apple" } ], "correctIndex": 2, "explanation": "Nvidia is the most valuable public company at about $5 trillion, driven by chips powering the AI boom. Apple and Microsoft trail it.", "source": { "label": "Fun with Numbers — Objective Test" }, "uid": "gn02ly1ohvg4g" }, { "id": "ot-sci-nvidia-driver", "shape": "mcq", "tags": [ "economy", "superlatives" ], "prompt": { "modality": "text", "value": "Nvidia's roughly $5 trillion valuation rests largely on demand for what?" }, "options": [ { "modality": "text", "value": "Chips powering the AI boom" }, { "modality": "text", "value": "Electric-car batteries" }, { "modality": "text", "value": "Online retail sales" }, { "modality": "text", "value": "Streaming video subscriptions" } ], "correctIndex": 0, "explanation": "Per the guide, Nvidia became the most valuable public company on the strength of the chips powering the AI boom — not streaming, batteries, or retail.", "source": { "label": "Fun with Numbers — Objective Test" }, "uid": "15eokpf9wo4pr" }, { "id": "ot-sci-not-paired", "shape": "mcq", "tags": [ "economy", "superlatives" ], "prompt": { "modality": "text", "value": "Which record pairing is NOT correct?" }, "options": [ { "modality": "text", "value": "Most valuable company — Apple" }, { "modality": "text", "value": "Fastest land animal — the cheetah" }, { "modality": "text", "value": "Most valuable company — Nvidia" }, { "modality": "text", "value": "Closest star — the Sun" } ], "correctIndex": 0, "explanation": "The most valuable public company is Nvidia at about $5 trillion, not Apple. The Sun and cheetah pairings are both correct.", "source": { "label": "Fun with Numbers — Objective Test" }, "uid": "1pawhx1cqr6qx" }, { "id": "ot-tallest-mtn-1", "shape": "mcq", "tags": [ "mountains", "everest" ], "prompt": { "modality": "text", "value": "Which peak is the tallest mountain on Earth?" }, "options": [ { "modality": "text", "value": "Aconcagua" }, { "modality": "text", "value": "Mount Everest" }, { "modality": "text", "value": "K2" }, { "modality": "text", "value": "Denali" } ], "correctIndex": 1, "explanation": "Mount Everest in the Himalayas is the tallest mountain on Earth at about 29,032 ft. K2 is second-highest, and Aconcagua and Denali are far shorter.", "source": { "label": "Fun with Numbers — Objective Test" }, "uid": "1gwhents1lu05" }, { "id": "ot-tallest-mtn-2", "shape": "mcq", "tags": [ "mountains", "k2" ], "prompt": { "modality": "text", "value": "K2 is part of which mountain range?" }, "options": [ { "modality": "text", "value": "The Andes" }, { "modality": "text", "value": "The Himalayas" }, { "modality": "text", "value": "The Alps" }, { "modality": "text", "value": "The Karakoram" } ], "correctIndex": 3, "explanation": "K2 (about 28,251 ft) is in the Karakoram range on the Pakistan-China border. Everest is in the Himalayas, Aconcagua in the Andes, and Mont Blanc in the Alps.", "source": { "label": "Fun with Numbers — Objective Test" }, "uid": "xslgwl1ptx50p" }, { "id": "ot-tallest-mtn-3", "shape": "mcq", "tags": [ "mountains", "elevation" ], "prompt": { "modality": "text", "value": "Approximately how tall is Mount Everest above sea level?" }, "options": [ { "modality": "text", "value": "22,831 feet" }, { "modality": "text", "value": "29,032 feet" }, { "modality": "text", "value": "20,310 feet" }, { "modality": "text", "value": "28,251 feet" } ], "correctIndex": 1, "explanation": "Everest stands at about 29,032 ft. 28,251 ft is K2, 22,831 ft is Aconcagua, and 20,310 ft is Denali.", "source": { "label": "Fun with Numbers — Objective Test" }, "uid": "xb7dn9i1w52p" }, { "id": "ot-tallest-mtn-4", "shape": "mcq", "tags": [ "mountains", "aconcagua" ], "prompt": { "modality": "text", "value": "A peak in the Andes and the highest mountain in South America — which is it?" }, "options": [ { "modality": "text", "value": "Mont Blanc" }, { "modality": "text", "value": "Aconcagua" }, { "modality": "text", "value": "Denali" }, { "modality": "text", "value": "K2" } ], "correctIndex": 1, "explanation": "Aconcagua (about 22,831 ft) in the Andes is South America's highest peak. Denali is highest in North America, K2 is in the Karakoram, and Mont Blanc is in the Alps.", "source": { "label": "Fun with Numbers — Objective Test" }, "uid": "1q70yze14ezqly" }, { "id": "ot-tallest-mtn-5", "shape": "mcq", "tags": [ "mountains", "k2" ], "prompt": { "modality": "text", "value": "Which mountain is known as the second-highest in the world?" }, "options": [ { "modality": "text", "value": "K2" }, { "modality": "text", "value": "Aconcagua" }, { "modality": "text", "value": "Mount Everest" }, { "modality": "text", "value": "Mount Kilimanjaro" } ], "correctIndex": 0, "explanation": "K2, in the Karakoram range, is the world's second-highest mountain at about 28,251 ft, just behind Everest.", "source": { "label": "Fun with Numbers — Objective Test" }, "uid": "1o849samcj05c" }, { "id": "ot-continental-1", "shape": "mcq", "tags": [ "mountains", "denali" ], "prompt": { "modality": "text", "value": "Denali, the highest peak in North America, is located in which US state?" }, "options": [ { "modality": "text", "value": "Alaska" }, { "modality": "text", "value": "California" }, { "modality": "text", "value": "Washington" }, { "modality": "text", "value": "Colorado" } ], "correctIndex": 0, "explanation": "Denali (about 20,310 ft) is in Alaska and is North America's highest peak. It was formerly known as Mount McKinley.", "source": { "label": "Fun with Numbers — Objective Test" }, "uid": "mq8ct3c9l6qn" }, { "id": "ot-continental-2", "shape": "mcq", "tags": [ "mountains", "continental-peaks" ], "prompt": { "modality": "text", "value": "Which of these mountains is NOT the highest peak of its continent?" }, "options": [ { "modality": "text", "value": "K2" }, { "modality": "text", "value": "Mount Kilimanjaro" }, { "modality": "text", "value": "Aconcagua" }, { "modality": "text", "value": "Denali" } ], "correctIndex": 0, "explanation": "Denali (North America), Aconcagua (South America), and Kilimanjaro (Africa) are each their continent's highest peak. K2 is the world's second-highest mountain but not a continental high point — Everest is Asia's highest.", "source": { "label": "Fun with Numbers — Objective Test" }, "uid": "1ik88q2bm0s9g" }, { "id": "ot-continental-3", "shape": "mcq", "tags": [ "mountains", "mont-blanc" ], "prompt": { "modality": "text", "value": "Mont Blanc, on the France-Italy border, is the highest peak in which range?" }, "options": [ { "modality": "text", "value": "The Andes" }, { "modality": "text", "value": "The Himalayas" }, { "modality": "text", "value": "The Karakoram" }, { "modality": "text", "value": "The Alps" } ], "correctIndex": 3, "explanation": "Mont Blanc (about 15,777 ft) is the highest peak in the Alps. The Andes, Himalayas, and Karakoram host other record peaks.", "source": { "label": "Fun with Numbers — Objective Test" }, "uid": "1y3u8nl1h8rso1" }, { "id": "ot-continental-4", "shape": "mcq", "tags": [ "mountains", "kilimanjaro" ], "prompt": { "modality": "text", "value": "In which country would you climb Mount Kilimanjaro, Africa's highest mountain?" }, "options": [ { "modality": "text", "value": "Tanzania" }, { "modality": "text", "value": "Pakistan" }, { "modality": "text", "value": "Kenya" }, { "modality": "text", "value": "Nepal" } ], "correctIndex": 0, "explanation": "Kilimanjaro (about 19,341 ft) is in Tanzania and is Africa's highest mountain, a popular trekking destination.", "source": { "label": "Fun with Numbers — Objective Test" }, "uid": "ypxwbs1o7hds6" }, { "id": "ot-supertall-1", "shape": "mcq", "tags": [ "buildings", "burj-khalifa" ], "prompt": { "modality": "text", "value": "Which structure is known as the tallest building in the world?" }, "options": [ { "modality": "text", "value": "Shanghai Tower" }, { "modality": "text", "value": "Burj Khalifa" }, { "modality": "text", "value": "Empire State Building" }, { "modality": "text", "value": "CN Tower" } ], "correctIndex": 1, "explanation": "The Burj Khalifa in Dubai (2,717 ft) is the world's tallest building. Shanghai Tower is 2,073 ft, and the others are shorter.", "source": { "label": "Fun with Numbers — Objective Test" }, "uid": "1lr85bffz341d" }, { "id": "ot-supertall-2", "shape": "mcq", "tags": [ "buildings", "dubai" ], "prompt": { "modality": "text", "value": "The Burj Khalifa, the world's tallest building, is located in which city?" }, "options": [ { "modality": "text", "value": "Shanghai" }, { "modality": "text", "value": "Toronto" }, { "modality": "text", "value": "Dubai" }, { "modality": "text", "value": "New York" } ], "correctIndex": 2, "explanation": "The Burj Khalifa is in Dubai and was completed in 2010. Shanghai, New York, and Toronto host other notable towers.", "source": { "label": "Fun with Numbers — Objective Test" }, "uid": "1qjefk6gpdyju" }, { "id": "ot-supertall-3", "shape": "mcq", "tags": [ "buildings", "wtc" ], "prompt": { "modality": "text", "value": "How tall is One World Trade Center in New York City?" }, "options": [ { "modality": "text", "value": "2,717 feet" }, { "modality": "text", "value": "1,776 feet" }, { "modality": "text", "value": "2,073 feet" }, { "modality": "text", "value": "1,815 feet" } ], "correctIndex": 1, "explanation": "One World Trade Center stands at 1,776 ft — a symbolic nod to 1776. 2,717 ft is the Burj Khalifa, 2,073 ft the Shanghai Tower, 1,815 ft the CN Tower.", "source": { "label": "Fun with Numbers — Objective Test" }, "uid": "zbvqmm1p1csgg" }, { "id": "ot-supertall-4", "shape": "mcq", "tags": [ "buildings", "shanghai-tower" ], "prompt": { "modality": "text", "value": "Which skyscraper is known for its unique twisting design?" }, "options": [ { "modality": "text", "value": "Shanghai Tower" }, { "modality": "text", "value": "Eiffel Tower" }, { "modality": "text", "value": "One World Trade Center" }, { "modality": "text", "value": "Burj Khalifa" } ], "correctIndex": 0, "explanation": "The Shanghai Tower (2,073 ft) in China features a distinctive twisting design. The others have different signature forms.", "source": { "label": "Fun with Numbers — Objective Test" }, "uid": "1r7ls8nn3l1c9" }, { "id": "ot-supertall-5", "shape": "mcq", "tags": [ "buildings", "shanghai-tower" ], "prompt": { "modality": "text", "value": "Which skyscraper stands at 2,073 feet tall?" }, "options": [ { "modality": "text", "value": "Burj Khalifa" }, { "modality": "text", "value": "CN Tower" }, { "modality": "text", "value": "One World Trade Center" }, { "modality": "text", "value": "Shanghai Tower" } ], "correctIndex": 3, "explanation": "The Shanghai Tower reaches 2,073 ft. The Burj Khalifa is 2,717 ft, One World Trade Center is 1,776 ft, and the CN Tower is 1,815 ft.", "source": { "label": "Fun with Numbers — Objective Test" }, "uid": "fvj15p10eeafz" }, { "id": "ot-iconic-1", "shape": "mcq", "tags": [ "towers", "eiffel" ], "prompt": { "modality": "text", "value": "Which iconic structure is an iron lattice tower and a cultural symbol of France?" }, "options": [ { "modality": "text", "value": "Shanghai Tower" }, { "modality": "text", "value": "Empire State Building" }, { "modality": "text", "value": "CN Tower" }, { "modality": "text", "value": "Eiffel Tower" } ], "correctIndex": 3, "explanation": "The Eiffel Tower (1,083 ft) in Paris is an iron lattice tower and global icon of France, completed in 1889 for the World's Fair.", "source": { "label": "Fun with Numbers — Objective Test" }, "uid": "giwo6cxu5on0" }, { "id": "ot-iconic-2", "shape": "mcq", "tags": [ "towers", "empire-state" ], "prompt": { "modality": "text", "value": "In what year was the Empire State Building completed?" }, "options": [ { "modality": "text", "value": "2010" }, { "modality": "text", "value": "1976" }, { "modality": "text", "value": "1931" }, { "modality": "text", "value": "1889" } ], "correctIndex": 2, "explanation": "The Empire State Building was completed in 1931. 1889 is the Eiffel Tower and 2010 is the Burj Khalifa.", "source": { "label": "Fun with Numbers — Objective Test" }, "uid": "s72lnn5uhfh1" }, { "id": "ot-iconic-3", "shape": "mcq", "tags": [ "towers", "cn-tower" ], "prompt": { "modality": "text", "value": "Which iconic tower features a revolving restaurant?" }, "options": [ { "modality": "text", "value": "Eiffel Tower" }, { "modality": "text", "value": "Shanghai Tower" }, { "modality": "text", "value": "Empire State Building" }, { "modality": "text", "value": "CN Tower" } ], "correctIndex": 3, "explanation": "Toronto's CN Tower (1,815 ft) features a revolving restaurant and once was the world's tallest free-standing structure.", "source": { "label": "Fun with Numbers — Objective Test" }, "uid": "1kknj6f1sdh63b" }, { "id": "ot-iconic-4", "shape": "mcq", "tags": [ "towers", "empire-state" ], "prompt": { "modality": "text", "value": "What is the height of the Empire State Building to its roof?" }, "options": [ { "modality": "text", "value": "1,815 feet" }, { "modality": "text", "value": "1,776 feet" }, { "modality": "text", "value": "1,083 feet" }, { "modality": "text", "value": "1,250 feet" } ], "correctIndex": 3, "explanation": "The Empire State Building rises 1,250 ft to its roof. 1,083 ft is the Eiffel Tower, 1,815 ft the CN Tower, and 1,776 ft One World Trade Center.", "source": { "label": "Fun with Numbers — Objective Test" }, "uid": "905tma1fezzcs" }, { "id": "fact-supertall-podium-2000-feet", "tags": [ "structures", "skyscraper", "height" ], "title": "Only three buildings, 2,000 feet", "body": "The 2,000-foot club has exactly three members: Dubai's Burj Khalifa at 2,717 feet, Kuala Lumpur's Merdeka 118 at 2,227, and the Shanghai Tower at 2,073. No other finished building has crossed that line. America's tallest, One World Trade Center, stops at a deliberately symbolic 1,776 feet — the year of the Declaration of Independence.", "shape": "fact", "factVariant": "image-heavy", "illustration": { "imagePrompt": "Only Three Buildings on Earth Clear 2,000 Feet. The 2,000-foot club has exactly three members: Dubai's Burj Khalifa at 2,717 feet, Kuala Lumpur's Merdeka 118 at 2,227, and the Shanghai Tower at 2,073. No other finished building has crossed that line. America's tallest, One World Trade Center, stops at a deliberately symbolic 1,776 feet — the year of the Declaration of Independence.", "imageSearchTerm": "Burj Khalifa Dubai skyline", "alt": "Only Three Buildings on Earth Clear 2,000 Feet", "url": "https://cdn.recurxive.com/packs/world-numbers/images/fact-supertall-podium-2000-feet.webp", "credit": "Pexels · Maria Charizani", "creditUrl": "https://www.pexels.com/photo/photo-of-city-during-night-time-5577693/" }, "uid": "r002l76szfw1" }, { "id": "fact-landmark-ladder-under-750-feet", "tags": [ "structures", "monument", "bridge" ], "title": "The Landmark Ladder", "body": "The landmarks we picture as giants all sit in one narrow band: the Golden Gate Bridge's towers at 746 feet, the Hoover Dam at 726, the Gateway Arch at 630 — exactly as wide at its base as it is tall — the Washington Monument at 555, the Great Pyramid at 481, and the Statue of Liberty, ground to torch, at 305. The Golden Gate's real superlative is sideways: a 4,200-foot main span.", "shape": "fact", "illustration": { "imageSearchTerm": "Golden Gate Bridge towers", "imagePrompt": "The Golden Gate Bridge's tall orange-red towers rising above San Francisco Bay with fog rolling beneath the deck.", "alt": "The Landmark Ladder", "depictable": true, "url": "https://cdn.recurxive.com/packs/world-numbers/images/fact-landmark-ladder-under-750-feet.webp", "credit": "Pexels · Stephen Leonardi", "creditUrl": "https://www.pexels.com/photo/golden-gate-bridge-against-a-cloudy-sky-37923282/" }, "uid": "xjm9pptjx8kt" }, { "id": "fact-great-pyramid-4000-year-record", "tags": [ "structures", "pyramid", "monument" ], "title": "Great Pyramid, nearly 4,000 years", "body": "At 481 feet, the Great Pyramid of Giza was the tallest structure on Earth for close to four millennia — a reign no modern building will ever approach. For contrast, the Washington Monument, finished in 1884 at 555 feet, held the same title for barely five years before the Eiffel Tower took it in 1889.", "shape": "fact", "factVariant": "image-heavy", "illustration": { "imagePrompt": "The Great Pyramid Held the Record for Nearly 4,000 Years. At 481 feet, the Great Pyramid of Giza was the tallest structure on Earth for close to four millennia — a reign no modern building will ever approach. For contrast, the Washington Monument, finished in 1884 at 555 feet, held the same title for barely five years before the Eiffel Tower took it in 1889.", "imageSearchTerm": "Great Pyramid Giza Egypt", "alt": "The Great Pyramid Held the Record for Nearly 4,000 Years", "url": "https://cdn.recurxive.com/packs/world-numbers/images/fact-great-pyramid-4000-year-record.webp", "credit": "Pexels · Walter Galvis", "creditUrl": "https://www.pexels.com/photo/piramides-de-egipto-28013721/" }, "uid": "mhckgw1s5igtm" }, { "id": "fact-mauna-kea-hidden-height", "tags": [ "mountains", "volcano", "height" ], "title": "Measured from the seafloor", "body": "Measured from sea level, Mauna Kea is a modest 13,803 feet, less than half of Everest's 29,032. Measured from its true base on the ocean floor, it rises about 33,500 feet — taller than Everest, with most of its height hidden underwater. Tallest always depends on where you start measuring.", "shape": "fact", "factVariant": "image-heavy", "illustration": { "imagePrompt": "The snow-dusted summit of Mauna Kea in Hawaii with white observatory domes against a deep blue sky.", "imageSearchTerm": "Mauna Kea summit Hawaii", "alt": "Mauna Kea Beats Everest — If You Start at the Seafloor", "depictable": true, "url": "https://cdn.recurxive.com/packs/world-numbers/images/fact-mauna-kea-hidden-height.webp", "credit": "Pexels · Tiago Espindola de Oliveira", "creditUrl": "https://www.pexels.com/photo/cyclist-approaching-mauna-kea-observatory-telescope-31312264/" }, "uid": "zjgm7ihvzh68" }, { "id": "fact-continental-high-points-ladder", "tags": [ "mountains", "peak", "height" ], "title": "After Everest, the drop-off", "body": "Aconcagua at 22,831 feet crowns the Americas and is the highest peak anywhere outside Asia. Below it the ladder drops quickly: Denali reaches 20,310 feet in North America, Kilimanjaro 19,341 in Africa, and Mont Blanc 15,777 in the Alps. Mount Whitney, the highest in the contiguous United States, manages only 14,505.", "shape": "fact", "illustration": { "imageSearchTerm": "Aconcagua peak Andes", "imagePrompt": "Aconcagua's rugged, snow-streaked summit rising above the Andes mountain range under a clear sky.", "alt": "After Everest, the drop-off", "depictable": true, "url": "https://cdn.recurxive.com/packs/world-numbers/images/fact-continental-high-points-ladder.webp", "credit": "Pexels · Nikolai Kolosov", "creditUrl": "https://www.pexels.com/photo/stunning-andes-mountain-range-in-winter-37175080/" }, "uid": "dq7lkn1x1m3at" }, { "id": "fact-k2-shorter-and-deadlier", "tags": [ "mountains", "peak", "height" ], "title": "K2, shorter than Everest, deadlier", "body": "At 28,251 feet, K2 falls just 781 feet short of Everest's 29,032 — but it is the climber's mountain: steeper, stormier and far more lethal. Everest was first climbed in winter in 1980; K2 held out until January 2021, the last of the 8,000-metre peaks to be taken in the cold season.", "shape": "fact", "illustration": { "imageSearchTerm": "K2 mountain Karakoram", "imagePrompt": "K2's steep, pyramidal peak rising sharply from the Karakoram range, snow and ice clinging to its sheer faces.", "alt": "K2, shorter than Everest, deadlier", "depictable": true, "url": "https://cdn.recurxive.com/packs/world-numbers/images/fact-k2-shorter-and-deadlier.webp", "credit": "Pexels · Arif Esapzai", "creditUrl": "https://www.pexels.com/photo/majestic-snow-capped-mountains-at-sunset-in-pakistan-35302563/" }, "uid": "1eyh0791uwke8r" }, { "id": "fact-nile-length-amazon-volume", "tags": [ "water", "river", "lake" ], "title": "Nile longer, Amazon mightier", "body": "The Nile usually takes the longest-river title at about 4,132 miles, with the Amazon barely behind at 3,977 — yet the Amazon carries vastly more water than any other river on Earth. North America's longest, the Mississippi–Missouri system, runs 3,710 miles. The deepest lake is a different sort of record: Siberia's Lake Baikal, 5,387 feet down, holds about a fifth of the world's unfrozen fresh water.", "shape": "fact", "illustration": { "imageSearchTerm": "Nile River aerial view", "imagePrompt": "An aerial view of the Nile River winding as a green ribbon through the surrounding desert landscape.", "alt": "Nile longer, Amazon mightier", "depictable": true, "url": "https://cdn.recurxive.com/packs/world-numbers/images/fact-nile-length-amazon-volume.webp", "credit": "Pexels · Dimitra M.K", "creditUrl": "https://www.pexels.com/photo/6th-october-bridge-in-cairo-20840208/" }, "uid": "1of16ct1osiygz" }, { "id": "fact-angel-falls-to-challenger-deep", "tags": [ "water", "waterfall", "ocean" ], "title": "Deeper than Everest is tall", "body": "Angel Falls in Venezuela drops 3,212 feet — so far that in the dry season the water blows away as mist before it reaches the bottom. Niagara falls only about 326 feet and takes its force from sheer volume instead. Neither compares with going down: Challenger Deep in the Mariana Trench lies about 35,876 feet below the surface, deeper than Everest is tall.", "shape": "fact", "factVariant": "image-heavy", "illustration": { "imagePrompt": "Angel Falls in Venezuela, a tall thin waterfall plunging from a sheer tabletop mountain into misty jungle below.", "imageSearchTerm": "Angel Falls Venezuela waterfall", "alt": "3,212 Feet of Falling Water, 35,876 Feet of Ocean", "depictable": true, "url": "https://cdn.recurxive.com/packs/world-numbers/images/fact-angel-falls-to-challenger-deep.webp", "credit": "Pexels · Ederik Palencia Ferreira", "creditUrl": "https://www.pexels.com/photo/scenic-panorama-with-river-cascade-and-a-distant-tepui-mountain-canaima-national-park-venezuela-7360544/" }, "uid": "15g8oo7181g0i3" }, { "id": "fact-russia-sahara-alaska-scale", "tags": [ "earth", "country", "desert", "usa" ], "title": "Russia spans eleven time zones", "body": "Russia covers about 6.6 million square miles — enough to run through eleven time zones. The Sahara sprawls across roughly 3.6 million, nearly the area of the entire United States. And a single US state, Alaska, at about 663,000 square miles, is larger than most countries on Earth.", "shape": "fact", "illustration": { "imageSearchTerm": "Sahara Desert sand dunes", "imagePrompt": "Vast golden sand dunes of the Sahara Desert rippling toward the horizon under a bright sky.", "alt": "Russia spans eleven time zones", "depictable": true, "url": "https://cdn.recurxive.com/packs/world-numbers/images/fact-russia-sahara-alaska-scale.webp", "credit": "Pexels · Stijn Dijkstra", "creditUrl": "https://www.pexels.com/photo/golden-dunes-of-the-sahara-desert-at-dusk-30710172/" }, "uid": "1s7c6981suk122" }, { "id": "fact-great-wall-half-the-planet", "tags": [ "earth", "landmark", "great-wall" ], "title": "The Great Wall Is Longer Than Half the Planet", "body": "Counting every branch and spur, the Great Wall of China runs about 13,171 miles — more than half the 24,901 miles around the Earth at the equator. It was never one wall or one project: sections were built, abandoned and rebuilt across some two thousand years.", "shape": "fact", "factVariant": "image-heavy", "illustration": { "imagePrompt": "The Great Wall Is Longer Than Half the Planet. Counting every branch and spur, the Great Wall of China runs about 13,171 miles — more than half the 24,901 miles around the Earth at the equator. It was never one wall or one project: sections were built, abandoned and rebuilt across some two thousand years.", "imageSearchTerm": "Great Wall of China mountains", "alt": "The Great Wall Is Longer Than Half the Planet", "url": "https://cdn.recurxive.com/packs/world-numbers/images/fact-great-wall-half-the-planet.webp", "credit": "Unsplash · Hanson Lu", "creditUrl": "https://unsplash.com/photos/great-wall-of-china-china-_8EFj6ISA08" }, "uid": "tp6gly1lz3lvq" }, { "id": "fact-grand-canyon-and-dead-sea", "tags": [ "earth", "canyon", "sea" ], "title": "Mile down, below sea level", "body": "The Grand Canyon is about 6,000 feet from rim to river — over a mile straight down, cut by the Colorado over millions of years. The lowest land on Earth goes further still: the shore of the Dead Sea sits roughly 1,410 feet below sea level, in water so dense with salt that swimmers float without trying.", "shape": "fact", "illustration": { "imageSearchTerm": "Grand Canyon rim view", "imagePrompt": "The layered red and orange rock walls of the Grand Canyon dropping from the rim toward the Colorado River far below.", "alt": "Mile down, below sea level", "depictable": true, "url": "https://cdn.recurxive.com/packs/world-numbers/images/fact-grand-canyon-and-dead-sea.webp", "credit": "Pexels · Mark Direen", "creditUrl": "https://www.pexels.com/photo/breathtaking-view-of-the-grand-canyon-36148651/" }, "uid": "16dni14y61xhe" }, { "id": "fact-longest-nonstop-flight", "tags": [ "distance", "aviation", "earth" ], "title": "Eighteen hours, nonstop to Singapore", "body": "The longest scheduled nonstop flight covers about 9,537 miles from New York to Singapore in some 18 hours — more than a third of the way around a planet whose equator measures 24,901 miles. For scale, crossing the United States by road, New York to San Francisco, is only about 2,900 miles.", "shape": "fact", "illustration": { "imageSearchTerm": "airplane flying above clouds", "imagePrompt": "A commercial airliner cruising high above a sea of clouds, sunlight glinting off its wing.", "alt": "Eighteen hours, nonstop to Singapore", "depictable": true, "url": "https://cdn.recurxive.com/packs/world-numbers/images/fact-longest-nonstop-flight.webp", "credit": "Pexels · Amar Preciado", "creditUrl": "https://www.pexels.com/photo/flying-airplane-wing-behind-window-in-sky-14400667/" }, "uid": "1wp1uwm5zz5tm" }, { "id": "fact-channel-21-miles-195-countries", "tags": [ "distance", "seas", "countries" ], "title": "21 miles wide, 195 countries", "body": "Some of the numbers that matter are surprisingly small. The English Channel narrows to about 21 miles at the Strait of Dover — close enough that swimmers have been crossing it since 1875. And the whole world those journeys cross divides into only about 195 countries, UN members plus observers, for eight billion people.", "shape": "fact", "illustration": { "imageSearchTerm": "White Cliffs of Dover", "imagePrompt": "The White Cliffs of Dover rising above the English Channel coastline under an open sky.", "alt": "21 miles wide, 195 countries", "depictable": true, "url": "https://cdn.recurxive.com/packs/world-numbers/images/fact-channel-21-miles-195-countries.webp", "credit": "Pexels · JACK REDGATE", "creditUrl": "https://www.pexels.com/photo/aerial-photo-of-cliff-3013956/" }, "uid": "1tpx8dmsvq2ze" }, { "id": "fact-tokyo-is-four-londons", "tags": [ "population", "city", "tokyo" ], "title": "Greater Tokyo Is Four Londons", "body": "About 37 million people live in Greater Tokyo, the largest urban area on Earth — roughly three São Paulos (12 million) or four Londons (9.5 million) folded into one metropolitan region. Anchor your guesses on Western capitals and you will usually come in too low.", "shape": "fact", "factVariant": "image-heavy", "illustration": { "imagePrompt": "A dense aerial view of the Greater Tokyo skyline, buildings packed together stretching to the horizon.", "imageSearchTerm": "Greater Tokyo skyline cityscape", "alt": "Greater Tokyo Is Four Londons", "depictable": true, "url": "https://cdn.recurxive.com/packs/world-numbers/images/fact-tokyo-is-four-londons.webp", "credit": "Pexels · jesus esteban", "creditUrl": "https://www.pexels.com/photo/aerial-view-of-shibuya-crossing-in-tokyo-35744614/" }, "uid": "a2ey20l76tkc" }, { "id": "fact-twenty-million-club", "tags": [ "population", "city", "ranking" ], "title": "Cairo, Mumbai clear 20 million", "body": "Tokyo is not the only city on this list past 20 million: Cairo holds about 21.8 million people and Mumbai about 20.4 million. The famous Western capitals are nowhere near — London, the largest of them, has about 9.5 million, under half the 20-million line.", "shape": "fact", "illustration": { "imageSearchTerm": "Cairo Egypt cityscape skyline", "imagePrompt": "A sprawling aerial view of Cairo's dense cityscape with the Nile River cutting through the buildings.", "alt": "Cairo, Mumbai clear 20 million", "depictable": true, "url": "https://cdn.recurxive.com/packs/world-numbers/images/fact-twenty-million-club.webp", "credit": "Pexels · Simon Berger", "creditUrl": "https://www.pexels.com/photo/the-mosque-madrasa-of-sultan-hassan-10586819/" }, "uid": "1mnfh031x8ho1h" }, { "id": "fact-western-cities-ranked", "tags": [ "population", "city", "western", "ranking" ], "title": "The Famous Western Cities, Ranked", "body": "Line up the Western cities everyone can name and the numbers are smaller than the fame: London about 9.5 million, New York City proper about 8.3 million, Sydney around 5.3 million, and Paris — the city itself — only about 2.2 million. All four added together would still fall short of Greater Tokyo.", "shape": "fact", "illustration": { "imageSearchTerm": "London city skyline", "imagePrompt": "The London skyline along the Thames River with the city's mix of historic and modern towers visible.", "alt": "The Famous Western Cities, Ranked", "depictable": true, "url": "https://cdn.recurxive.com/packs/world-numbers/images/fact-western-cities-ranked.webp", "credit": "Pexels · Manzoni Studios", "creditUrl": "https://www.pexels.com/photo/20-fenchurch-street-skyscraper-and-tower-of-london-at-night-14936005/" }, "uid": "14lex1o1knyics" }, { "id": "fact-first-billion-took-until-1804", "tags": [ "population", "world", "comparison" ], "title": "The First Billion Took Until 1804", "body": "All of human history up to about 1804 was needed to reach the first billion people. The world now holds roughly 8.1 billion and adds another billion every dozen years or so — a milestone that once took millennia now takes about a decade.", "shape": "fact", "illustration": { "imageSearchTerm": "large crowd gathering", "imagePrompt": "A vast, dense crowd of people filling an open plaza as far as the eye can see, symbolizing population growth, no text or signage.", "alt": "The First Billion Took Until 1804", "depictable": false }, "uid": "vcj0pv185wts5" }, { "id": "fact-india-passed-china", "tags": [ "population", "country", "india", "china" ], "title": "India passed China", "body": "India is now the most populous country on Earth at about 1.43 billion, having recently overtaken China's 1.41 billion — India kept growing while China levelled off. The United States comes third at about 336 million, less than a quarter of either Asian giant.", "shape": "fact", "illustration": { "imageSearchTerm": "crowded Indian street market", "imagePrompt": "A bustling, densely packed street market scene with many people moving through narrow lanes, symbolizing a large population, no text or signage.", "alt": "India passed China", "depictable": false }, "uid": "yprskeme8fa4" }, { "id": "fact-moon-three-day-trip", "tags": [ "space", "distance", "moon" ], "title": "Three Days Out, One Second Back", "body": "The Moon sits about 238,855 miles from Earth — far enough that the Apollo astronauts needed three days to get there, close enough that its reflected light reaches us in just over a second. It is still the only world beyond Earth that humans have set foot on.", "shape": "fact", "factVariant": "image-heavy", "illustration": { "imagePrompt": "Three Days Out, One Second Back. The Moon sits about 238,855 miles from Earth — far enough that the Apollo astronauts needed three days to get there, close enough that its reflected light reaches us in just over a second. It is still the only world beyond Earth that humans have set foot on.", "imageSearchTerm": "full moon night sky", "alt": "Three Days Out, One Second Back", "url": "https://cdn.recurxive.com/packs/world-numbers/images/fact-moon-three-day-trip.webp", "credit": "Unsplash · Amit Padhiyar", "creditUrl": "https://unsplash.com/photos/a-full-moon-is-seen-through-the-clouds-DE76ubzPT20" }, "uid": "1vhhx8tzq5sd1" }, { "id": "fact-au-solar-system-yardstick", "tags": [ "space", "distance", "mars" ], "title": "The Solar System's Yardstick", "body": "The Earth–Sun distance, about 93 million miles, is defined as one astronomical unit (AU) — the ruler astronomers use for the whole solar system. It puts the neighbors in scale: Mars, even at its closest approach, is still about 34 million miles off, roughly a third of an AU, which is why a crewed round trip is measured in years rather than days.", "shape": "fact", "illustration": { "imageSearchTerm": "Sun and Mars space", "imagePrompt": "The bright Sun glowing in the blackness of space with the small reddish disk of Mars visible at a distance, conveying vast scale.", "alt": "The Solar System's Yardstick", "depictable": true, "url": "https://cdn.recurxive.com/packs/world-numbers/images/fact-au-solar-system-yardstick.webp", "credit": "Pexels · RDNE Stock project", "creditUrl": "https://www.pexels.com/photo/an-astronaut-standing-in-a-desolate-environment-8474792/" }, "uid": "13cjjfv3m7pxv" }, { "id": "fact-light-year-is-a-distance", "tags": [ "space", "light-year", "distance" ], "title": "A Light-Year Measures Distance, Not Time", "body": "Miles work fine close to home — Earth is about 7,918 miles across, and the ISS orbits a mere 250 miles up. Past the solar system they stop being useful, so astronomers switch to the light-year: the distance light covers in one year, about 5.88 trillion miles (9.46 trillion km). Proxima Centauri, the nearest star beyond the Sun, lies a bit over four of them away.", "shape": "fact", "illustration": { "imageSearchTerm": "starfield night sky stars", "imagePrompt": "A dense field of countless stars scattered across a dark night sky, evoking immense distances across space.", "alt": "A Light-Year Measures Distance, Not Time", "depictable": true, "url": "https://cdn.recurxive.com/packs/world-numbers/images/fact-light-year-is-a-distance.webp", "credit": "Pexels · Alexandre P. Junior", "creditUrl": "https://www.pexels.com/photo/a-starry-sky-7736059/" }, "uid": "1quaqlc1laq4i0" }, { "id": "fact-light-speed-cosmic-limit", "tags": [ "space", "light-speed", "constants" ], "title": "Light Laps the Earth Seven Times a Second", "body": "Light travels about 186,000 miles per second — fast enough to circle the Earth roughly seven times in the time it takes to say so, and the cosmic speed limit nothing with mass can reach. For contrast, the International Space Station races around Earth at 17,500 miles per hour: light covers in about a tenth of a second the distance the ISS needs a full hour to cross.", "shape": "fact", "illustration": { "imageSearchTerm": "International Space Station orbiting Earth", "imagePrompt": "The International Space Station orbiting above Earth's glowing blue curved horizon, with the darkness of space beyond.", "alt": "Light Laps the Earth Seven Times a Second", "depictable": true, "url": "https://cdn.recurxive.com/packs/world-numbers/images/fact-light-speed-cosmic-limit.webp", "credit": "Pexels · SpaceX", "creditUrl": "https://www.pexels.com/photo/satellite-view-of-earth-586072/" }, "uid": "1f3mg96hj4fvs" }, { "id": "fact-sun-dwarfs-everything", "tags": [ "space", "sun", "planets" ], "title": "Million Earths inside the Sun", "body": "The Sun measures about 864,000 miles across — so vast that more than a million Earths would fit inside it. Jupiter, the largest of the solar system's 8 planets, spans about 86,900 miles: roughly a tenth of the Sun's width, yet more than ten times Earth's. The whole tidy system — one ordinary star, eight planets — sits in a universe about 13.8 billion years old.", "shape": "fact", "factVariant": "image-heavy", "illustration": { "imagePrompt": "The Sun as a massive glowing sphere with a tiny Jupiter shown beside it for scale, both set against black space.", "imageSearchTerm": "Sun and Jupiter size", "alt": "A Million Earths Would Fit Inside the Sun", "depictable": true, "url": "https://cdn.recurxive.com/packs/world-numbers/images/fact-sun-dwarfs-everything.webp", "credit": "Pexels · Zelch Csaba", "creditUrl": "https://www.pexels.com/photo/planets-of-the-solar-system-orbiting-the-sun-7568783/" }, "uid": "w1z95r1jcfnup" }, { "id": "fact-billion-vs-trillion-gap", "tags": [ "money", "wealth", "scale" ], "title": "Billion: 32 years. Trillion: 32,000", "body": "The words sound alike but the gap is enormous: a million seconds is about 12 days, a billion about 32 years, a trillion about 32,000 years. The same gap runs through the money. In 2026 the world's richest person, Elon Musk, is worth roughly $800 billion — yet his fortune would have to grow more than sixfold to match Nvidia, valued at about $5.2 trillion, the first company ever to cross $5 trillion on the strength of AI-chip demand.", "shape": "fact", "illustration": { "imageSearchTerm": "stacked coins tower", "imagePrompt": "A small stack of coins beside an enormously tall tower of coins rising out of frame, illustrating an overwhelming gap in scale, no text or numbers.", "alt": "Billion: 32 years. Trillion: 32,000", "depictable": false }, "uid": "6xc3uxxqmfsn" }, { "id": "fact-world-gdp-110-trillion", "tags": [ "money", "world", "scale" ], "title": "The Whole Planet Earns $110 Trillion a Year", "body": "World GDP — the value of everything the planet produces in a year — is about $110 trillion, and the United States alone accounts for more than a quarter of it at roughly $30.8 trillion, the largest of any country. The US federal government spends about $6.4 trillion a year, a budget bigger than the entire economy of all but a handful of nations. Next to those figures ordinary prices look quaint: the median US home sells for about $407,600, and a Gerald R. Ford-class aircraft carrier costs about $13 billion.", "shape": "fact", "illustration": { "imageSearchTerm": "globe world map", "imagePrompt": "A softly lit globe of the Earth floating in dark space, symbolizing the scale of the world's total economic output, no text or numbers.", "alt": "The Whole Planet Earns $110 Trillion a Year", "depictable": false, "credit": "Openverse · Kevin M. Gill · CC BY 2.0", "creditUrl": "https://www.flickr.com/photos/53460575@N03/7187190855", "url": "https://cdn.recurxive.com/packs/world-numbers/sp-earthdia.jpg" }, "uid": "11mcojr1fccazn" }, { "id": "fact-47-presidencies-45-people", "tags": [ "usa", "presidency", "presidents" ], "title": "47 Presidencies, But Only 45 People", "body": "Count the US presidents through 2026 and the answer is 47 — but only 45 men have held the job. Donald Trump fills both the 45th and 47th slots because his terms were not consecutive, a quirk shared with exactly one predecessor: Grover Cleveland, the 22nd and 24th president. Each term, then as now, runs 4 years.", "shape": "fact", "illustration": { "imageSearchTerm": "White House Washington DC", "imagePrompt": "The White House exterior viewed from the front lawn in Washington, DC under a clear sky.", "alt": "47 Presidencies, But Only 45 People", "depictable": true, "url": "https://cdn.recurxive.com/packs/world-numbers/images/fact-47-presidencies-45-people.webp", "credit": "Pexels · Aaron Kittredge", "creditUrl": "https://www.pexels.com/photo/white-house-129112/" }, "uid": "tijozzti9yof" }, { "id": "fact-where-538-comes-from", "tags": [ "usa", "elections", "electoral-college" ], "title": "Where 538 votes come from", "body": "A candidate needs 270 electoral votes to win the presidency — a bare majority of 538. That total is not arbitrary: it is the 435 members of the House, plus the 100 senators, plus 3 votes granted to Washington, DC by the 23rd Amendment — one of only 27 changes made to the Constitution since it was ratified in 1788.", "shape": "fact", "illustration": { "imageSearchTerm": "US Capitol Building", "imagePrompt": "The US Capitol Building's white dome viewed from the National Mall under a clear sky.", "alt": "Where 538 votes come from", "depictable": true, "url": "https://cdn.recurxive.com/packs/world-numbers/images/fact-where-538-comes-from.webp", "credit": "Pexels · Ivan Dražić", "creditUrl": "https://www.pexels.com/photo/us-capitol-in-washington-dc-20417783/" }, "uid": "12kc5u01hn3m2c" }, { "id": "fact-flag-two-counts", "tags": [ "usa", "flag", "symbols" ], "title": "The Flag Records Two Different Counts", "body": "The US flag carries the country's history in two layers. The 50 stars stand for the current states, a number reached in 1959 when Alaska and Hawai'i joined. The 13 stripes stand for the original colonies that declared independence — a count that stays put no matter how many states join, while the stars multiply around it.", "shape": "fact", "factVariant": "image-heavy", "illustration": { "imagePrompt": "The Flag Records Two Different Counts. The US flag carries the country's history in two layers. The 50 stars stand for the current states, a number reached in 1959 when Alaska and Hawai'i joined. The 13 stripes stand for the original colonies that declared independence — a count that stays put no matter how many states join, while the stars multiply around it.", "imageSearchTerm": "American flag stars stripes", "alt": "The Flag Records Two Different Counts", "url": "https://cdn.recurxive.com/packs/world-numbers/images/fact-flag-two-counts.webp", "credit": "Unsplash · Tim Mossholder", "creditUrl": "https://unsplash.com/photos/us-a-flag-on-white-and-red-striped-textile-QsX23A3NgMQ" }, "uid": "8ud6gpkzgl8f" }, { "id": "fact-63-parks-among-hundreds", "tags": [ "usa", "parks", "national-parks" ], "title": "63 parks, hundreds of sites", "body": "Only 63 of the places the National Park System protects carry the full title of national park: Yellowstone — the first anywhere in the world when Congress created it in 1872 — plus Yosemite, the Grand Canyon and 60 others. Hundreds of monuments, seashores and historic sites belong to the system without being national parks.", "shape": "fact", "factVariant": "image-heavy", "illustration": { "imagePrompt": "63 National Parks Among Hundreds of Sites. Only 63 of the places the National Park System protects carry the full title of national park: Yellowstone — the first anywhere in the world when Congress created it in 1872 — plus Yosemite, the Grand Canyon and 60 others. Hundreds of monuments, seashores and historic sites belong to the system without being national parks.", "imageSearchTerm": "Grand Prismatic Spring Yellowstone", "alt": "63 National Parks Among Hundreds of Sites", "url": "https://cdn.recurxive.com/packs/world-numbers/images/fact-63-parks-among-hundreds.webp", "credit": "Unsplash · Nicolasintravel", "creditUrl": "https://unsplash.com/photos/geyser-within-mountain-range-during-daytime-oN3U95O4cag" }, "uid": "1e4wg51c8xy7" }, { "id": "fact-18-to-vote-35-to-run", "tags": [ "usa", "voting-age", "age" ], "title": "18 to Vote, 35 to Run", "body": "The voting age was 21 until the 26th Amendment lowered it to 18 in 1971, leaving a 17-year gap to the age the Constitution requires of a president: 35. That minimum is one of only three qualifications for the office, alongside being a natural-born citizen and having lived in the United States for 14 years.", "shape": "fact", "illustration": { "imageSearchTerm": "voting booth ballot box", "imagePrompt": "A hand placing a paper ballot into a voting box at a polling station.", "alt": "18 to Vote, 35 to Run", "depictable": true, "url": "https://cdn.recurxive.com/packs/world-numbers/images/fact-18-to-vote-35-to-run.webp", "credit": "Pexels · Edmond Dantès", "creditUrl": "https://www.pexels.com/photo/white-boxes-on-the-table-near-american-flag-7103091/" }, "uid": "1xbbth16jorpf" }, { "id": "fact-blue-whale-and-cheetah-records", "tags": [ "animals", "records", "whale", "speed" ], "title": "Two hundred tons, car-sized heart", "body": "The blue whale is the largest animal that has ever lived — up to 200 tons, heavier than the biggest dinosaurs, with a heart roughly the size of a small car. On land the record goes to speed instead of bulk: the cheetah hits about 70 miles per hour in short bursts, faster than anything else that runs.", "shape": "fact", "factVariant": "image-heavy", "illustration": { "imagePrompt": "A massive blue whale gliding through open ocean water, its enormous body visible beneath the surface.", "imageSearchTerm": "blue whale swimming ocean", "alt": "Two Hundred Tons, and a Heart the Size of a Car", "depictable": true, "url": "https://cdn.recurxive.com/packs/world-numbers/images/fact-blue-whale-and-cheetah-records.webp", "credit": "Pexels · Stuart Robinson", "creditUrl": "https://www.pexels.com/photo/humpback-whale-tail-in-new-south-wales-waters-38156468/" }, "uid": "11yz4ii1fs6p5u" }, { "id": "fact-human-extremes-depth-and-heat", "tags": [ "records", "diving", "weather" ], "title": "Two-thirds as deep, single breath", "body": "The deepest scuba dive on record reached 1,090 feet — a descent that took years of planning and hours of slow ascent to survive. Free-divers riding a weighted sled, holding one breath, have gone 702 feet down: roughly two-thirds as deep, with no air at all. The land-side extreme is heat — 134°F in Death Valley, California, the highest air temperature ever reliably recorded on Earth.", "shape": "fact", "illustration": { "imageSearchTerm": "freediver descending deep water", "imagePrompt": "A freediver descending gracefully into deep blue ocean water on a single breath, sunlight rays filtering down from above.", "alt": "Two-thirds as deep, single breath", "depictable": true, "url": "https://cdn.recurxive.com/packs/world-numbers/images/fact-human-extremes-depth-and-heat.webp", "credit": "Pexels · Emma Li", "creditUrl": "https://www.pexels.com/photo/scuba-diver-underwater-5462439/" }, "uid": "jmm27m6uelfm" }, { "id": "fact-trench-deeper-than-everest-is-tall", "tags": [ "superlatives", "mountains", "ocean" ], "title": "Deepest point beats tallest peak", "body": "Everest tops out at 29,032 feet, but the Mariana Trench bottoms out near 35,900 — sink the mountain into the trench and its summit would still sit more than a mile underwater. The rest of the physical podium: the Nile, longest river at about 4,130 miles, and the Burj Khalifa, tallest building at 2,717 feet.", "shape": "fact", "illustration": { "imageSearchTerm": "Mount Everest summit snow", "imagePrompt": "Mount Everest's snow-covered summit ridge rising above the clouds against a deep blue sky.", "alt": "Deepest point beats tallest peak", "depictable": true, "url": "https://cdn.recurxive.com/packs/world-numbers/images/fact-trench-deeper-than-everest-is-tall.webp", "credit": "Pexels · zhou shen", "creditUrl": "https://www.pexels.com/photo/snow-in-mountains-18651260/" }, "uid": "2fj5et1gplqsv" }, { "id": "fact-russia-india-and-47-presidents", "tags": [ "superlatives", "countries", "population", "presidents" ], "title": "Biggest Country, Biggest Crowd, 47 Presidents", "body": "Russia is the largest country by area at about 6.6 million square miles, while India is now the most populous, with roughly 1.43 billion people after passing China. The United States counts 47 presidents through 2026 — a total that includes Trump twice, as both the 45th and the 47th, because his terms were not consecutive. Grover Cleveland is numbered the same way.", "shape": "fact", "illustration": { "imageSearchTerm": "world map globe", "imagePrompt": "An abstract world globe softly lit against dark space, with a few landmasses gently highlighted, symbolizing country-scale comparisons, no text or labels.", "alt": "Biggest Country, Biggest Crowd, 47 Presidents", "depictable": false }, "uid": "1boqith1verqd3" }, { "id": "fact-closest-star-and-most-valuable-company", "tags": [ "superlatives", "astronomy", "economy" ], "title": "Two Records That Trip People Up", "body": "The closest star to Earth is the one you see every day: the Sun, about 93 million miles away — the next-nearest, Proxima Centauri, is over four light-years off. And the most valuable public company is not Apple or Microsoft but Nvidia, worth about $5 trillion on the strength of the chips powering the AI boom.", "shape": "fact", "illustration": { "imageSearchTerm": "semiconductor computer chip", "imagePrompt": "A macro close-up of a computer processor chip with intricate circuitry patterns catching the light.", "alt": "Two Records That Trip People Up", "depictable": true, "url": "https://cdn.recurxive.com/packs/world-numbers/images/fact-closest-star-and-most-valuable-company.webp", "credit": "Pexels · ed br", "creditUrl": "https://www.pexels.com/photo/close-up-of-a-modern-microprocessor-circuit-board-37052613/" }, "uid": "1sxq7yy13rviqw" }, { "id": "fact-everest-and-k2-different-ranges", "tags": [ "mountains", "geography", "elevation" ], "title": "Second place, different range", "body": "Everest, at 29,032 feet, is the tallest mountain on Earth, and K2 trails it by only 781 feet at 28,251. But they are not neighbors: Everest sits in the Himalayas, while K2 rises from the Karakoram on the Pakistan–China border — a colder, harder climb that far fewer people have ever completed.", "shape": "fact", "factVariant": "image-heavy", "illustration": { "imagePrompt": "Mount Everest towering above the jagged peaks of the Himalayan range, sunlight catching its snow-covered summit.", "imageSearchTerm": "Everest Himalayas mountain range", "alt": "Second Place by 781 Feet — and a Different Range", "depictable": true, "url": "https://cdn.recurxive.com/packs/world-numbers/images/fact-everest-and-k2-different-ranges.webp", "credit": "Pexels · Clairey Sunshine", "creditUrl": "https://www.pexels.com/photo/photo-of-snow-covered-mountains-4665370/" }, "uid": "c9zf3k12v754k" }, { "id": "fact-continental-high-points", "tags": [ "mountains", "continental-peaks", "geography" ], "title": "The Continental Champions (K2 Isn't One)", "body": "Three of these peaks are continental high points: Aconcagua (22,831 ft) in the Andes for South America, Denali (20,310 ft) in Alaska — long known as Mount McKinley — for North America, and Kilimanjaro (19,341 ft) in Tanzania for Africa. K2 is not on that list despite being the world's second-highest mountain, because Asia's high point is Everest.", "shape": "fact", "factVariant": "image-heavy", "illustration": { "imagePrompt": "The Continental Champions (K2 Isn't One). Three of these peaks are continental high points: Aconcagua (22,831 ft) in the Andes for South America, Denali (20,310 ft) in Alaska — long known as Mount McKinley — for North America, and Kilimanjaro (19,341 ft) in Tanzania for Africa. K2 is not on that list despite being the world's second-highest mountain, because Asia's high point is Everest.", "imageSearchTerm": "Mount Kilimanjaro Tanzania", "alt": "The Continental Champions (K2 Isn't One)", "url": "https://cdn.recurxive.com/packs/world-numbers/images/fact-continental-high-points.webp", "credit": "Unsplash · Harshil Gudka", "creditUrl": "https://unsplash.com/photos/rock-formation-mountain-under-blue-sky-yDiDd2bBUM4" }, "uid": "1or4l5i1ux8lsa" }, { "id": "fact-mont-blanc-highest-in-the-alps", "tags": [ "mountains", "mont-blanc", "geography" ], "title": "The Alps' highest, half Everest", "body": "At 15,777 feet, Mont Blanc is just over half the height of Everest's 29,032 — and still the highest point in the Alps, straddling the border between France and Italy. Climbers reach its summit in a couple of days; Everest takes weeks of acclimatization first.", "shape": "fact", "illustration": { "imageSearchTerm": "Mont Blanc Alps peak", "imagePrompt": "Mont Blanc's snow-covered summit rising above the surrounding French and Italian Alps under a clear sky.", "alt": "The Alps' highest, half Everest", "depictable": true, "url": "https://cdn.recurxive.com/packs/world-numbers/images/fact-mont-blanc-highest-in-the-alps.webp", "credit": "Pexels · Ercan Evcimen", "creditUrl": "https://www.pexels.com/photo/breathtaking-view-of-snowy-chamonix-mountains-30514668/" }, "uid": "us71c31g664kt" }, { "id": "fact-burj-khalifa-and-shanghai-tower", "tags": [ "buildings", "structures", "records" ], "title": "Tallest building, and the twist", "body": "The Burj Khalifa in Dubai has been the world's tallest building since it was completed in 2010, at 2,717 feet. Also among the giants is Shanghai Tower at 2,073 feet, whose signature twist is engineering as much as style: the spiraling form breaks up the wind that would otherwise batter a tower that tall.", "shape": "fact", "factVariant": "image-heavy", "illustration": { "imagePrompt": "The Tallest Building, and the One That Twists. The Burj Khalifa in Dubai has been the world's tallest building since it was completed in 2010, at 2,717 feet. Also among the giants is Shanghai Tower at 2,073 feet, whose signature twist is engineering as much as style: the spiraling form breaks up the wind that would otherwise batter a tower that tall.", "imageSearchTerm": "Burj Khalifa Dubai skyline", "alt": "The Tallest Building, and the One That Twists", "url": "https://cdn.recurxive.com/packs/world-numbers/images/fact-burj-khalifa-and-shanghai-tower.webp", "credit": "Unsplash · David Rodrigo", "creditUrl": "https://unsplash.com/photos/aerial-photo-of-city-highway-surrounded-by-high-rise-buildings-Fr6zexbmjmc" }, "uid": "1nv07ivx74w2" }, { "id": "fact-one-world-trade-center-1776-feet", "tags": [ "buildings", "towers", "wtc" ], "title": "A height chosen for 1776", "body": "One World Trade Center rises exactly 1,776 feet — the year of the Declaration of Independence, written into the New York skyline as the symbol rebuilt after the September 11 attacks. It is not the tallest thing on the continent, though: Toronto's CN Tower, with its revolving restaurant, edges it out at 1,815 feet and held the world's free-standing height record for 32 years.", "shape": "fact", "illustration": { "imageSearchTerm": "One World Trade Center", "imagePrompt": "One World Trade Center's glass spire rising above the Manhattan skyline against a blue sky.", "alt": "A height chosen for 1776", "depictable": true, "url": "https://cdn.recurxive.com/packs/world-numbers/images/fact-one-world-trade-center-1776-feet.webp", "credit": "Pexels · Denil Dominic", "creditUrl": "https://www.pexels.com/photo/one-wtc-in-nyc-18388935/" }, "uid": "12kbedq1wum8tc" }, { "id": "fact-eiffel-and-empire-state-reigns", "tags": [ "towers", "eiffel", "empire-state" ], "title": "Two towers, 40 years each", "body": "The Eiffel Tower — 1,083 feet of iron lattice, built for the 1889 World's Fair — stood as the tallest structure on Earth for four decades, until New York's skyscraper race overtook it. The Empire State Building, finished in 1931 at 1,250 feet to its roof, then held the tallest-building title for nearly forty years of its own.", "shape": "fact", "illustration": { "imageSearchTerm": "Eiffel Tower Paris", "imagePrompt": "The Eiffel Tower's iron lattice structure rising above the rooftops of Paris on a clear day.", "alt": "Two towers, 40 years each", "depictable": true, "url": "https://cdn.recurxive.com/packs/world-numbers/images/fact-eiffel-and-empire-state-reigns.webp", "credit": "Pexels · Mehmet Turgut Kirkgoz", "creditUrl": "https://www.pexels.com/photo/low-angle-shot-of-the-eiffel-tower-against-blue-sky-16496484/" }, "uid": "nrvzvkowypm8" }, { "id": "fi-wn-mcq-onewtc-1776", "tags": [ "skyscraper", "height" ], "title": "1,776 feet, on purpose", "body": "One World Trade Center stands 1,776 feet tall, the tallest building in the US and the Western Hemisphere — a height deliberately chosen to echo 1776, the year of the Declaration of Independence.", "shape": "fact", "illustration": { "imageSearchTerm": "One World Trade Center skyscraper", "imagePrompt": "One World Trade Center's tall glass tower rising above the lower Manhattan skyline.", "alt": "1,776 feet, on purpose", "depictable": true, "url": "https://cdn.recurxive.com/packs/world-numbers/images/fi-wn-mcq-onewtc-1776.webp", "credit": "Pexels · Denil Dominic", "creditUrl": "https://www.pexels.com/photo/one-wtc-in-nyc-18388935/" }, "uid": "hikra01k3c6wo" }, { "id": "fi-mc-tallest", "tags": [ "structures" ], "title": "2,717 feet", "body": "At 2,717 feet, the Burj Khalifa is more than double the height of One World Trade Center and over three times as tall as the Eiffel Tower.", "shape": "fact", "illustration": { "imageSearchTerm": "Burj Khalifa Dubai", "imagePrompt": "The Burj Khalifa's needle-thin spire towering above the Dubai skyline at dusk.", "alt": "2,717 feet", "depictable": true, "url": "https://cdn.recurxive.com/packs/world-numbers/images/fi-mc-tallest.webp", "credit": "Pexels · Maria Charizani", "creditUrl": "https://www.pexels.com/photo/photo-of-city-during-night-time-5577693/" }, "uid": "144ajuj1aha41" }, { "id": "fi-wn-mcq-washmon-height", "tags": [ "monument", "height" ], "title": "555 feet, once tallest", "body": "The Washington Monument rises 555 feet — a height that made it the tallest structure in the world when it was completed.", "shape": "fact", "illustration": { "imageSearchTerm": "Washington Monument obelisk", "imagePrompt": "The Washington Monument's white stone obelisk rising against a blue sky in Washington, DC.", "alt": "555 feet, once tallest", "depictable": true, "url": "https://cdn.recurxive.com/packs/world-numbers/images/fi-wn-mcq-washmon-height.webp", "credit": "Pexels · SAM TEECE", "creditUrl": "https://www.pexels.com/photo/grayscale-photo-of-washington-monument-6859711/" }, "uid": "124z5uj1n45d0l" }, { "id": "fi-wn-mcq-arch-height", "tags": [ "monument", "height" ], "title": "630 feet, both ways", "body": "St. Louis's Gateway Arch stands 630 feet tall and also measures 630 feet across its base, giving it a perfectly symmetrical footprint.", "shape": "fact", "illustration": { "imageSearchTerm": "Gateway Arch St Louis", "imagePrompt": "The silver Gateway Arch curving gracefully against the sky above the St. Louis riverfront.", "alt": "630 feet, both ways", "depictable": true, "url": "https://cdn.recurxive.com/packs/world-numbers/images/fi-wn-mcq-arch-height.webp", "credit": "Pexels · Shegs Olu", "creditUrl": "https://www.pexels.com/photo/modern-arch-located-under-gray-sky-4562459/" }, "uid": "qfpbobv48ngn" }, { "id": "fi-wn-mcq-everest-height", "tags": [ "mountains", "height" ], "title": "29,032 feet up", "body": "Mount Everest's peak rises to 29,032 feet above sea level, making it the highest point on Earth.", "shape": "fact", "illustration": { "imageSearchTerm": "Mount Everest peak snow", "imagePrompt": "Mount Everest's snow-capped summit piercing through a layer of clouds against a deep blue sky.", "alt": "29,032 feet up", "depictable": true, "url": "https://cdn.recurxive.com/packs/world-numbers/images/fi-wn-mcq-everest-height.webp", "credit": "Pexels · zhou shen", "creditUrl": "https://www.pexels.com/photo/snow-in-mountains-18651260/" }, "uid": "1nin2laubbgr6" }, { "id": "fi-wn-mcq-africa-highpoint", "tags": [ "mountains", "peak" ], "title": "Standing entirely alone", "body": "Mount Kilimanjaro, at 19,341 feet, is not only Africa's highest peak but also the world's tallest mountain that stands alone rather than as part of a range.", "shape": "fact", "illustration": { "imageSearchTerm": "Mount Kilimanjaro Tanzania", "imagePrompt": "Mount Kilimanjaro's snow-capped summit rising alone above the African savanna.", "alt": "Standing entirely alone", "depictable": true, "url": "https://cdn.recurxive.com/packs/world-numbers/images/fi-wn-mcq-africa-highpoint.webp", "credit": "Pexels · Balazs Simon", "creditUrl": "https://www.pexels.com/photo/trail-with-a-view-of-a-mountain-range-15993988/" }, "uid": "1iriyofl1h2c7" }, { "id": "fi-ot-rivers-3", "tags": [ "rivers", "mississippi" ], "title": "North America's longest river", "body": "North America's longest river system, the Mississippi–Missouri, stretches about 3,710 miles — shorter than both the Nile (~4,130 mi) and the Amazon (~3,980 mi).", "shape": "fact", "illustration": { "imageSearchTerm": "Mississippi River aerial view", "imagePrompt": "The wide, winding Mississippi River seen from above, cutting through green farmland.", "alt": "North America's longest river", "depictable": true, "url": "https://cdn.recurxive.com/packs/world-numbers/images/fi-ot-rivers-3.webp", "credit": "Pexels · Tom Fisk", "creditUrl": "https://www.pexels.com/photo/bridge-over-swamp-and-river-leading-on-riverside-with-city-26851251/" }, "uid": "15tt9lq1tualow" }, { "id": "fi-ot-rivers-5", "tags": [ "waterfalls", "niagara" ], "title": "Power without height", "body": "Niagara Falls, far shorter than Angel Falls, drops only about 326 feet — its power comes instead from its enormous volume of water.", "shape": "fact", "illustration": { "imageSearchTerm": "Niagara Falls waterfall", "imagePrompt": "Niagara Falls churning with a massive volume of white water, mist rising from its base.", "alt": "Power without height", "depictable": true, "url": "https://cdn.recurxive.com/packs/world-numbers/images/fi-ot-rivers-5.webp", "credit": "Pexels · Hashim Gaad", "creditUrl": "https://www.pexels.com/photo/niagara-falls-ontario-canada-14436931/" }, "uid": "1b2pqep130sjrp" }, { "id": "fi-ot-land-4", "tags": [ "alaska", "states" ], "title": "663,000 square miles", "body": "Alaska covers about 663,000 square miles, making it by far the largest US state — and larger in area than most of the world's countries.", "shape": "fact", "illustration": { "imageSearchTerm": "Alaska mountains wilderness", "imagePrompt": "A vast Alaskan wilderness landscape with snow-capped mountains and open tundra stretching to the horizon.", "alt": "663,000 square miles", "depictable": true, "url": "https://cdn.recurxive.com/packs/world-numbers/images/fi-ot-land-4.webp", "credit": "Pexels · Alex Antsiferov", "creditUrl": "https://www.pexels.com/photo/scenic-view-of-mountains-3241583/" }, "uid": "1wfdaj643atv2" }, { "id": "fi-ot-land-1", "tags": [ "grand-canyon", "land" ], "title": "Rim to river", "body": "The Grand Canyon plunges about 6,000 feet from rim to river, a chasm carved by the Colorado.", "shape": "fact", "illustration": { "imageSearchTerm": "Rim to river", "imagePrompt": "Rim to river. The Grand Canyon plunges about 6,000 feet from rim to river, a chasm carved by the Colorado.", "alt": "Rim to river", "url": "https://cdn.recurxive.com/packs/world-numbers/images/fi-ot-land-1.webp", "credit": "Unsplash · Andrew Svk", "creditUrl": "https://unsplash.com/photos/the-sun-is-setting-over-the-mountains-in-the-desert-hlDQhML3wmI" }, "uid": "1tjzhy31nkbgdh" }, { "id": "fi-ot-dist-1", "tags": [ "circumference", "distance" ], "title": "Once around the planet", "body": "The Earth's circumference at the equator is 24,901 miles — the distance you'd travel going all the way around the planet.", "shape": "fact", "illustration": { "imageSearchTerm": "Once around the planet", "imagePrompt": "Once around the planet. The Earth's circumference at the equator is 24,901 miles — the distance you'd travel going all the way around the planet.", "alt": "Once around the planet", "url": "https://cdn.recurxive.com/packs/world-numbers/images/fi-ot-dist-1.webp", "credit": "Unsplash · NASA", "creditUrl": "https://unsplash.com/photos/earth-with-clouds-above-the-african-continent-vhSz50AaFAs" }, "uid": "rl2p3f1o0c1lj" }, { "id": "fi-ot-dist-5", "tags": [ "route66", "distance" ], "title": "Chicago to Santa Monica", "body": "Historic Route 66 stretched about 2,448 miles, linking Chicago all the way to Santa Monica.", "shape": "fact", "illustration": { "imageSearchTerm": "Route 66 highway sign", "imagePrompt": "A classic Route 66 road sign beside a long desert highway stretching toward the horizon.", "alt": "Chicago to Santa Monica", "depictable": true, "url": "https://cdn.recurxive.com/packs/world-numbers/images/fi-ot-dist-5.webp", "credit": "Pexels · Daniel Nettesheim", "creditUrl": "https://www.pexels.com/photo/white-and-blue-route-66-logo-1162361/" }, "uid": "xdjihw1w9l7sw" }, { "id": "fi-ot-megacities-canada", "tags": [ "tokyo", "comparison" ], "title": "Bigger than a country", "body": "The Greater Tokyo metro area holds about 37 million people — more than the entire population of Canada.", "shape": "fact", "illustration": { "imageSearchTerm": "Tokyo cityscape crowded streets", "imagePrompt": "A crowded Tokyo street scene at night with glowing signs and densely packed buildings.", "alt": "Bigger than a country", "depictable": true, "url": "https://cdn.recurxive.com/packs/world-numbers/images/fi-ot-megacities-canada.webp", "credit": "Pexels · sugar jet", "creditUrl": "https://www.pexels.com/photo/crowded-shopping-street-21620075/" }, "uid": "kxiagx1v4ay07" }, { "id": "fi-ot-megacities-magnitude", "tags": [ "ranking", "magnitude" ], "title": "Even megacities look small", "body": "Greater Tokyo's roughly 37 million residents are about three times São Paulo's population of around 12 million, showing how far Tokyo outstrips even a major megacity.", "shape": "fact", "illustration": { "imageSearchTerm": "São Paulo Brazil skyline", "imagePrompt": "The dense high-rise skyline of São Paulo, Brazil stretching to the horizon under a hazy sky.", "alt": "Even megacities look small", "depictable": true, "url": "https://cdn.recurxive.com/packs/world-numbers/images/fi-ot-megacities-magnitude.webp", "credit": "Pexels · Kaique Rocha", "creditUrl": "https://www.pexels.com/photo/aerial-photography-of-central-park-in-new-york-281514/" }, "uid": "vv9cll5eedtr" }, { "id": "fi-ot-west-smallest", "tags": [ "paris", "ranking" ], "title": "Paris, surprisingly small", "body": "Paris proper is home to about 2.2 million people — fewer than Sydney (~5.3 million), New York City (~8.3 million), or London (~9.5 million).", "shape": "fact", "illustration": { "imageSearchTerm": "Paris city rooftops", "imagePrompt": "Parisian rooftops and boulevards viewed from above, with the Eiffel Tower visible in the distance.", "alt": "Paris, surprisingly small", "depictable": true, "url": "https://cdn.recurxive.com/packs/world-numbers/images/fi-ot-west-smallest.webp", "credit": "Pexels · Diego F. Parra", "creditUrl": "https://www.pexels.com/photo/cityscape-of-paris-16934118/" }, "uid": "ws8r7p8ao975" }, { "id": "fi-ot-nations-world-num", "tags": [ "world", "population" ], "title": "Adding a billion, fast", "body": "The global population has climbed to roughly 8.1 billion, with humanity adding another billion people every dozen years or so.", "shape": "fact", "illustration": { "imageSearchTerm": "crowded plaza people", "imagePrompt": "An abstract mass of countless small human silhouettes filling a vast open space, symbolizing global population growth, no text or numbers.", "alt": "Adding a billion, fast", "depictable": false }, "uid": "nvz4ac652lsw" }, { "id": "fi-ot-cosmicdist-3", "tags": [ "mars", "distance" ], "title": "Mars, never truly close", "body": "Even at its closest approach to Earth, Mars sits about 34 million miles away — far enough that a crewed round-trip would take years.", "shape": "fact", "illustration": { "imageSearchTerm": "Mars red planet surface", "imagePrompt": "The rust-red, rocky surface of Mars stretching toward a dusty, pale horizon.", "alt": "Mars, never truly close", "depictable": true, "url": "https://cdn.recurxive.com/packs/world-numbers/images/fi-ot-cosmicdist-3.webp", "credit": "Pexels · Zelch Csaba", "creditUrl": "https://www.pexels.com/photo/moon-in-space-12498801/" }, "uid": "1cz6cx7v1zo1r" }, { "id": "fi-ot-cosmicdist-4", "tags": [ "iss", "earth", "reference-scale" ], "title": "The ISS altitude myth", "body": "The International Space Station orbits about 250 miles above Earth — not 2,500 miles, a figure that overstates its altitude by a factor of ten.", "shape": "fact", "illustration": { "imageSearchTerm": "Earth curvature atmosphere space", "imagePrompt": "Earth's thin blue atmosphere glowing along its curved horizon, seen looking down from low orbit.", "alt": "The ISS altitude myth", "depictable": true, "url": "https://cdn.recurxive.com/packs/world-numbers/images/fi-ot-cosmicdist-4.webp", "credit": "Pexels · Jaymantri", "creditUrl": "https://www.pexels.com/photo/blue-and-gray-moon-during-nighttime-5439/" }, "uid": "1c99rh61dzjslq" }, { "id": "fi-ot-sizespeed-2", "tags": [ "jupiter", "size" ], "title": "Jupiter, dwarfing Earth", "body": "Jupiter, the largest planet, measures roughly 86,900 miles across — vastly smaller than the Sun's 864,000-mile span, but still dwarfing Earth's 7,918 miles.", "shape": "fact", "illustration": { "imageSearchTerm": "Jupiter planet gas giant", "imagePrompt": "Jupiter's swirling orange and white cloud bands with its Great Red Spot visible against black space.", "alt": "Jupiter, dwarfing Earth", "depictable": true, "url": "https://cdn.recurxive.com/packs/world-numbers/images/fi-ot-sizespeed-2.webp", "credit": "Pexels · Zelch Csaba", "creditUrl": "https://www.pexels.com/photo/jupiter-planet-on-black-background-20337602/" }, "uid": "scs8svf0tbqr" }, { "id": "fi-ot-sizespeed-4", "tags": [ "universe", "age" ], "title": "The universe's head start", "body": "Since the Big Bang, the universe is estimated to be about 13.8 billion years old — far older than Earth, whose age is closer to 4.5 billion years.", "shape": "fact", "illustration": { "imageSearchTerm": "Earth planet from space", "imagePrompt": "Earth as a blue and white sphere floating in space, distant stars scattered in the surrounding darkness.", "alt": "The universe's head start", "depictable": true, "url": "https://cdn.recurxive.com/packs/world-numbers/images/fi-ot-sizespeed-4.webp", "credit": "Pexels · Zelch Csaba", "creditUrl": "https://www.pexels.com/photo/stunning-view-of-earth-from-space-30596291/" }, "uid": "1lynpwo1jvosg2" }, { "id": "fi-ot-natscale-budget", "tags": [ "federal-budget", "scale" ], "title": "The federal price tag", "body": "US federal budget outlays run about $6.4 trillion annually — well below total US GDP (~$30.8 trillion) or world GDP (~$110 trillion).", "shape": "fact", "illustration": { "imageSearchTerm": "US dollar bills", "imagePrompt": "A neat stack of US dollar bills beside a much larger stack, symbolizing a budget dwarfed by overall economic output, no text or numbers.", "alt": "The federal price tag", "depictable": false, "credit": "Openverse · 401(K) 2013 · CC BY-SA 2.0", "creditUrl": "https://www.flickr.com/photos/68751915@N05/6355261479", "url": "https://cdn.recurxive.com/packs/world-numbers/mo-debt.jpg" }, "uid": "15h0seg16fuhrc" }, { "id": "fi-ot-gdp-measures", "tags": [ "gdp", "definition" ], "title": "What GDP actually measures", "body": "Gross domestic product is the total value of all goods and services a country produces in a year — a measure of output, not of debt or wealth.", "shape": "fact", "illustration": { "imageSearchTerm": "factory production line", "imagePrompt": "A factory production line with goods moving along a conveyor belt, symbolizing national economic output, no text or logos.", "alt": "What GDP actually measures", "depictable": false }, "uid": "a6qfw6h56pry" }, { "id": "fi-ot-congress-ev-win", "tags": [ "electoral-college" ], "title": "The magic number to win", "body": "Winning the US presidency requires 270 electoral votes — a simple majority of the Electoral College's 538 total votes.", "shape": "fact", "illustration": { "imageSearchTerm": "American flag voting ballot", "imagePrompt": "A hand dropping a ballot into a voting box with an American flag softly visible in the background.", "alt": "The magic number to win", "depictable": true, "url": "https://cdn.recurxive.com/packs/world-numbers/images/fi-ot-congress-ev-win.webp", "credit": "Pexels · Mikhail Nilov", "creditUrl": "https://www.pexels.com/photo/person-holding-ballot-box-8846070/" }, "uid": "3fr4ld79svnh" }, { "id": "fi-ot-pres-term", "tags": [ "presidency", "term" ], "title": "Different jobs, different terms", "body": "Each US presidential term runs 4 years, compared with 2 years for a House term, 6 years for a Senate term, and an 8-year cap across two terms.", "shape": "fact", "illustration": { "imageSearchTerm": "calendar pages turning", "imagePrompt": "A desk calendar with pages turning and drifting away, symbolizing the passage of years in a term of office, no text or numbers.", "alt": "Different jobs, different terms", "depictable": false, "credit": "Openverse · Dusty J · CC BY 2.0", "creditUrl": "https://www.flickr.com/photos/55608722@N06/7997921501", "url": "https://cdn.recurxive.com/packs/world-numbers/us-presidents.jpg" }, "uid": "1jjccxn14q5b4z" }, { "id": "fi-ot-flag-states", "tags": [ "states", "flag" ], "title": "The last two states", "body": "The US grew to its current 50 states in 1959, when Alaska and Hawai'i both joined the union.", "shape": "fact", "illustration": { "imageSearchTerm": "Hawaii tropical island coastline", "imagePrompt": "A lush Hawaiian coastline with green cliffs meeting turquoise ocean water.", "alt": "The last two states", "depictable": true, "url": "https://cdn.recurxive.com/packs/world-numbers/images/fi-ot-flag-states.webp", "credit": "Pexels · Jess Loiterton", "creditUrl": "https://www.pexels.com/photo/green-mountain-near-the-ocean-4321834/" }, "uid": "1plevel11qh04t" }, { "id": "fi-ot-age-vote", "tags": [ "voting-age" ], "title": "When voting age dropped", "body": "The US voting age used to be 21 until the 26th Amendment brought it down to 18, the threshold still in place today.", "shape": "fact", "illustration": { "imageSearchTerm": "young voter polling place", "imagePrompt": "A young adult casting a ballot at a polling place, sliding the paper into a voting box.", "alt": "When voting age dropped", "depictable": true, "url": "https://cdn.recurxive.com/packs/world-numbers/images/fi-ot-age-vote.webp", "credit": "Pexels · Edmond Dantès", "creditUrl": "https://www.pexels.com/photo/woman-in-red-blazer-standing-inside-a-polling-place-7103172/" }, "uid": "79rp30w5p9pw" }, { "id": "fi-ot-human-body-2", "tags": [ "human body", "heart" ], "title": "Never taking a break", "body": "The average human heart beats roughly 100,000 times every day, keeping a steady rhythm with no scheduled breaks.", "shape": "fact", "illustration": { "imageSearchTerm": "heartbeat monitor EKG line", "imagePrompt": "A glowing heartbeat line pulsing steadily across a dark medical monitor screen.", "alt": "Never taking a break", "depictable": true, "url": "https://cdn.recurxive.com/packs/world-numbers/images/fi-ot-human-body-2.webp", "credit": "Pexels · Pixabay", "creditUrl": "https://www.pexels.com/photo/selective-focus-photography-of-white-and-black-vital-sign-printing-paper-415779/" }, "uid": "1icdafo4dnovg" }, { "id": "fi-ot-animal-records-1", "tags": [ "animals", "cheetah" ], "title": "Nature's fastest sprinter", "body": "In short bursts, a cheetah can run at roughly 70 miles per hour, making it the fastest land animal alive.", "shape": "fact", "illustration": { "imageSearchTerm": "cheetah running full speed", "imagePrompt": "A cheetah sprinting at full speed across open grassland, its body stretched low and fast.", "alt": "Nature's fastest sprinter", "depictable": true, "url": "https://cdn.recurxive.com/packs/world-numbers/images/fi-ot-animal-records-1.webp", "credit": "Pexels · Bruno Almeida", "creditUrl": "https://www.pexels.com/photo/leopard-running-on-a-safari-27037675/" }, "uid": "vpv1wynd7bmi" }, { "id": "fi-ot-phys-longest-river", "tags": [ "rivers", "superlatives" ], "title": "Beats the Amazon", "body": "At roughly 4,130 miles long, the Nile is the longest river in the world — longer than the Amazon, the Yangtze, or the Mississippi.", "shape": "fact", "illustration": { "imageSearchTerm": "Nile River Egypt banks", "imagePrompt": "The Nile River flowing past green riverbanks with open desert visible in the distance.", "alt": "Beats the Amazon", "depictable": true, "url": "https://cdn.recurxive.com/packs/world-numbers/images/fi-ot-phys-longest-river.webp", "credit": "Pexels · Omar", "creditUrl": "https://www.pexels.com/photo/boats-and-ferries-on-the-nile-25070513/" }, "uid": "1hy7qik122vopc" }, { "id": "fi-ot-phys-not-paired", "tags": [ "buildings", "superlatives" ], "title": "The common mix-up", "body": "The world's tallest building is the Burj Khalifa at 2,717 feet — not the Eiffel Tower, which people sometimes name by mistake.", "shape": "fact", "illustration": { "imageSearchTerm": "Burj Khalifa tower skyline", "imagePrompt": "The Burj Khalifa rising far above the surrounding Dubai skyline, viewed looking up from street level.", "alt": "The common mix-up", "depictable": true, "url": "https://cdn.recurxive.com/packs/world-numbers/images/fi-ot-phys-not-paired.webp", "credit": "Pexels · Walid Ahmad", "creditUrl": "https://www.pexels.com/photo/majestic-view-of-burj-khalifa-and-dubai-skyline-31566720/" }, "uid": "o9wqxy1esirjg" }, { "id": "fi-mcq-rw-lc-places", "tags": [ "mountains", "geography", "africa" ], "title": "Kilimanjaro's exact height", "body": "Mount Kilimanjaro in Tanzania rises about 19,341 feet, making it the highest mountain in Africa.", "shape": "fact", "illustration": { "imageSearchTerm": "Kilimanjaro snow peak Tanzania", "imagePrompt": "Mount Kilimanjaro's snow-capped summit rising above clouds over the Tanzanian plains.", "alt": "Kilimanjaro's exact height", "depictable": true, "url": "https://cdn.recurxive.com/packs/world-numbers/images/fi-mcq-rw-lc-places.webp", "credit": "Pexels · Joseph Ruwa", "creditUrl": "https://www.pexels.com/photo/clouds-around-volcano-5109704/" }, "uid": "notwiu1c55tv2" }, { "id": "fi-ot-tallest-mtn-4", "tags": [ "mountains", "aconcagua" ], "title": "Bigger than Denali", "body": "Rising about 22,831 feet in the Andes, Aconcagua is the highest mountain in South America — taller than Denali, North America's highest peak.", "shape": "fact", "illustration": { "imageSearchTerm": "Aconcagua Andes mountain summit", "imagePrompt": "Aconcagua's rugged, snow-streaked summit rising above the surrounding Andes mountain range.", "alt": "Bigger than Denali", "depictable": true, "url": "https://cdn.recurxive.com/packs/world-numbers/images/fi-ot-tallest-mtn-4.webp", "credit": "Pexels · Nikolai Kolosov", "creditUrl": "https://www.pexels.com/photo/stunning-andes-mountain-range-in-winter-37175080/" }, "uid": "1kp90t61248ru0" }, { "id": "fi-mcq-rw-lc-things", "tags": [ "structures", "towers", "records" ], "title": "Toronto's revolving restaurant", "body": "Toronto's CN Tower, which rises 1,815 feet and features a revolving restaurant, once held the record as the world's tallest free-standing structure.", "shape": "fact", "illustration": { "imageSearchTerm": "CN Tower Toronto skyline", "imagePrompt": "The CN Tower rising above the Toronto skyline, its distinctive spire visible against the sky.", "alt": "Toronto's revolving restaurant", "depictable": true, "url": "https://cdn.recurxive.com/packs/world-numbers/images/fi-mcq-rw-lc-things.webp", "credit": "Pexels · Jeffrey Eisen", "creditUrl": "https://www.pexels.com/photo/city-skyline-across-body-of-water-13420120/" }, "uid": "2njayh132hzxn" }, { "id": "fi-ot-supertall-5", "tags": [ "buildings", "shanghai-tower" ], "title": "China's skyscraper giant", "body": "The Shanghai Tower in China stands about 2,073 feet tall, making it one of the world's tallest skyscrapers.", "shape": "fact", "illustration": { "imageSearchTerm": "Shanghai Tower China skyscraper", "imagePrompt": "The twisting glass facade of the Shanghai Tower rising above the Shanghai skyline.", "alt": "China's skyscraper giant", "depictable": true, "url": "https://cdn.recurxive.com/packs/world-numbers/images/fi-ot-supertall-5.webp", "credit": "Pexels · sam Zheng", "creditUrl": "https://www.pexels.com/photo/skyward-view-of-modern-skyscrapers-against-blue-sky-29662103/" }, "uid": "vypla0qx8kuy" }, { "id": "ot-cov-obj-megacities-1", "shape": "mcq", "tags": [ "population", "cities", "ranking" ], "prompt": { "modality": "text", "value": "Which of these four is the world's most populous metro area?" }, "options": [ { "modality": "text", "value": "Cairo" }, { "modality": "text", "value": "São Paulo" }, { "modality": "text", "value": "Tokyo" }, { "modality": "text", "value": "Mumbai" } ], "correctIndex": 2, "explanation": "Greater Tokyo, at about 37 million people, is the largest metro area on Earth, well ahead of Cairo, Mumbai, and São Paulo.", "source": { "label": "Fun with Numbers — Objective Test" }, "uid": "bpchca4lcjtu" }, { "id": "ot-cov-obj-cosmic-sizes-speeds-1", "shape": "mcq", "tags": [ "space", "size", "planets" ], "prompt": { "modality": "text", "value": "Which of these has the largest diameter?" }, "options": [ { "modality": "text", "value": "Mars" }, { "modality": "text", "value": "Earth" }, { "modality": "text", "value": "the Sun" }, { "modality": "text", "value": "Jupiter" } ], "correctIndex": 2, "explanation": "The Sun spans about 864,000 miles across, roughly ten times the diameter of Jupiter (about 86,900 miles), the largest of these four.", "source": { "label": "Fun with Numbers — Objective Test" }, "uid": "15e47kj1ltb1cd" }, { "id": "ot-cov-obj-cosmic-sizes-speeds-2", "shape": "mcq", "tags": [ "space", "light", "speed" ], "prompt": { "modality": "text", "value": "Light is fast enough to circle the Earth how many times in one second?" }, "options": [ { "modality": "text", "value": "Fifty times" }, { "modality": "text", "value": "A dozen times" }, { "modality": "text", "value": "Hundreds of times" }, { "modality": "text", "value": "Seven times" } ], "correctIndex": 3, "explanation": "Light travels about 186,000 miles per second, fast enough to circle the Earth seven times in a single second.", "source": { "label": "Fun with Numbers — Objective Test" }, "uid": "1t20xuiy55m6w" }, { "id": "ot-cov-wealth-scales-1", "shape": "mcq", "tags": [ "money", "companies", "wealth" ], "prompt": { "modality": "text", "value": "About how much is Nvidia worth, making it the world's most valuable public company (2026)?" }, "options": [ { "modality": "text", "value": "$3.8 trillion" }, { "modality": "text", "value": "$800 billion" }, { "modality": "text", "value": "$12 trillion" }, { "modality": "text", "value": "$5.2 trillion" } ], "correctIndex": 3, "explanation": "Nvidia's market value hit about $5.2 trillion in 2026, the first company ever to cross $5 trillion.", "source": { "label": "Fun with Numbers — Objective Test" }, "uid": "1i5ucx3avjaz" }, { "id": "ot-cov-wealth-scales-2", "shape": "mcq", "tags": [ "money", "companies", "milestones" ], "prompt": { "modality": "text", "value": "Nvidia became the first company ever to cross what market-value milestone?" }, "options": [ { "modality": "text", "value": "$10 trillion" }, { "modality": "text", "value": "$1 trillion" }, { "modality": "text", "value": "$5 trillion" }, { "modality": "text", "value": "$3 trillion" } ], "correctIndex": 2, "explanation": "Nvidia's roughly $5.2 trillion valuation made it the first company to pass the $5 trillion mark.", "source": { "label": "Fun with Numbers — Objective Test" }, "uid": "121ra4q1in164i" }, { "id": "ot-cov-wealth-scales-3", "shape": "mcq", "tags": [ "money", "wealth", "billionaires" ], "prompt": { "modality": "text", "value": "About how much is Elon Musk's net worth, making him the world's richest person (2026)?" }, "options": [ { "modality": "text", "value": "$1.5 trillion" }, { "modality": "text", "value": "$800 billion" }, { "modality": "text", "value": "$400 billion" }, { "modality": "text", "value": "$250 billion" } ], "correctIndex": 1, "explanation": "Musk's net worth reached around $800 billion in 2026, the largest personal fortune on Earth.", "source": { "label": "Fun with Numbers — Objective Test" }, "uid": "1i3ufnc1e00788" }, { "id": "ot-cov-wealth-scales-4", "shape": "mcq", "tags": [ "money", "wealth", "gdp" ], "prompt": { "modality": "text", "value": "Elon Musk's roughly $800 billion fortune is often noted to exceed what?" }, "options": [ { "modality": "text", "value": "the GDP of most nations" }, { "modality": "text", "value": "the US national debt" }, { "modality": "text", "value": "Nvidia's market value" }, { "modality": "text", "value": "the US federal budget" } ], "correctIndex": 0, "explanation": "Musk's net worth exceeds the annual GDP of most countries in the world.", "source": { "label": "Fun with Numbers — Objective Test" }, "uid": "118ruj115yio1h" }, { "id": "ot-cov-identify-aggregates-1", "shape": "mcq", "tags": [ "economy", "gdp", "debt" ], "prompt": { "modality": "text", "value": "How does the US national debt differ in kind from US GDP?" }, "options": [ { "modality": "text", "value": "Both measure one year of federal spending" }, { "modality": "text", "value": "Debt accumulates over time; GDP is one year's output" }, { "modality": "text", "value": "GDP accumulates over time; debt is one year's output" }, { "modality": "text", "value": "Debt and GDP measure the exact same thing" } ], "correctIndex": 1, "explanation": "National debt is money owed built up over years, while GDP measures the value produced in a single year.", "source": { "label": "Fun with Numbers — Objective Test" }, "uid": "3meskq1n5soke" }, { "id": "ot-cov-identify-aggregates-2", "shape": "mcq", "tags": [ "economy", "gdp", "debt" ], "prompt": { "modality": "text", "value": "By mid-2026, how did the US national debt compare to US GDP?" }, "options": [ { "modality": "text", "value": "Debt equaled the federal budget (~$6.4T)" }, { "modality": "text", "value": "Debt (~$38.9T) exceeded GDP (~$30.8T)" }, { "modality": "text", "value": "GDP (~$30.8T) exceeded debt (~$38.9T)" }, { "modality": "text", "value": "Debt and GDP were roughly equal" } ], "correctIndex": 1, "explanation": "By mid-2026 the roughly $38.9 trillion debt had grown larger than the $30.8 trillion annual GDP.", "source": { "label": "Fun with Numbers — Objective Test" }, "uid": "1p0a5uadvdwwy" }, { "id": "ot-cov-flag-states-1", "shape": "mcq", "tags": [ "usa", "states", "geography" ], "prompt": { "modality": "text", "value": "How many states make up the United States?" }, "options": [ { "modality": "text", "value": "52" }, { "modality": "text", "value": "50" }, { "modality": "text", "value": "13" }, { "modality": "text", "value": "48" } ], "correctIndex": 1, "explanation": "The US has 50 states, a number reached in 1959 when Alaska and Hawai'i joined.", "source": { "label": "Fun with Numbers — Objective Test" }, "uid": "12j4dfm1bm2a5k" }, { "id": "ot-cov-flag-states-2", "shape": "mcq", "tags": [ "usa", "states", "history" ], "prompt": { "modality": "text", "value": "Which event brought the US to its current count of 50 states?" }, "options": [ { "modality": "text", "value": "Alaska and Hawai'i joining in 1959" }, { "modality": "text", "value": "The original colonies uniting" }, { "modality": "text", "value": "Texas annexation" }, { "modality": "text", "value": "The Louisiana Purchase" } ], "correctIndex": 0, "explanation": "Alaska and Hawai'i became states in 1959, bringing the total to the current 50.", "source": { "label": "Fun with Numbers — Objective Test" }, "uid": "1q8rb5d1ej1t59" }, { "id": "ot-cov-flag-states-3", "shape": "mcq", "tags": [ "usa", "flag", "symbols" ], "prompt": { "modality": "text", "value": "What does each of the 13 stripes on the US flag represent?" }, "options": [ { "modality": "text", "value": "One of the original thirteen colonies" }, { "modality": "text", "value": "One of the first states to ratify the Constitution" }, { "modality": "text", "value": "A member of the Continental Congress" }, { "modality": "text", "value": "A branch of the US armed forces" } ], "correctIndex": 0, "explanation": "Each of the 13 stripes stands for one of the original colonies that declared independence.", "source": { "label": "Fun with Numbers — Objective Test" }, "uid": "1yaozl51y1e2j9" }, { "id": "ot-cov-flag-states-4", "shape": "mcq", "tags": [ "usa", "flag", "symbols" ], "prompt": { "modality": "text", "value": "On the US flag, what do the stripes track that differs from what the stars track?" }, "options": [ { "modality": "text", "value": "Presidents, while stars track amendments" }, { "modality": "text", "value": "Foreign allies, while stars track wars won" }, { "modality": "text", "value": "Territories, while stars track senators" }, { "modality": "text", "value": "The founding colonies, while stars track current states" } ], "correctIndex": 3, "explanation": "The 13 stripes stayed fixed for the original colonies, while the 50 stars grow with each new state.", "source": { "label": "Fun with Numbers — Objective Test" }, "uid": "11xyiev2oekpl" }, { "id": "ot-cov-physical-superlatives-1", "shape": "mcq", "tags": [ "geography", "superlatives", "mountains" ], "prompt": { "modality": "text", "value": "Which mountain is Earth's tallest, rising about 29,032 feet?" }, "options": [ { "modality": "text", "value": "Mount Everest" }, { "modality": "text", "value": "Denali" }, { "modality": "text", "value": "K2" }, { "modality": "text", "value": "Kangchenjunga" } ], "correctIndex": 0, "explanation": "Mount Everest, at 29,032 feet, is the tallest mountain on Earth.", "source": { "label": "Fun with Numbers — Objective Test" }, "uid": "bd08r433bsbq" }, { "id": "ot-cov-physical-superlatives-2", "shape": "mcq", "tags": [ "geography", "superlatives", "mountains" ], "prompt": { "modality": "text", "value": "About how tall is Mount Everest, the world's tallest mountain?" }, "options": [ { "modality": "text", "value": "35,900 ft" }, { "modality": "text", "value": "20,310 ft" }, { "modality": "text", "value": "29,032 ft" }, { "modality": "text", "value": "22,837 ft" } ], "correctIndex": 2, "explanation": "Everest stands about 29,032 feet tall, the highest point on Earth's surface.", "source": { "label": "Fun with Numbers — Objective Test" }, "uid": "1gpknyo1gisyui" }, { "id": "ot-cov-physical-superlatives-3", "shape": "mcq", "tags": [ "geography", "superlatives", "ocean" ], "prompt": { "modality": "text", "value": "What is the deepest known point in the ocean?" }, "options": [ { "modality": "text", "value": "Java Trench" }, { "modality": "text", "value": "Puerto Rico Trench" }, { "modality": "text", "value": "Tonga Trench" }, { "modality": "text", "value": "Mariana Trench" } ], "correctIndex": 3, "explanation": "The Mariana Trench is the ocean's deepest known point, at about 35,900 feet.", "source": { "label": "Fun with Numbers — Objective Test" }, "uid": "4eo2l81yn38ae" }, { "id": "ot-cov-physical-superlatives-4", "shape": "mcq", "tags": [ "geography", "superlatives", "ocean" ], "prompt": { "modality": "text", "value": "About how deep is the Mariana Trench, the ocean's deepest point?" }, "options": [ { "modality": "text", "value": "8,000 ft" }, { "modality": "text", "value": "12,000 ft" }, { "modality": "text", "value": "29,032 ft" }, { "modality": "text", "value": "35,900 ft" } ], "correctIndex": 3, "explanation": "The Mariana Trench plunges to roughly 35,900 feet, deeper than Everest is tall.", "source": { "label": "Fun with Numbers — Objective Test" }, "uid": "ksdfh41cs1ebg" }, { "id": "ot-cov-physical-superlatives-5", "shape": "mcq", "tags": [ "geography", "superlatives", "buildings" ], "prompt": { "modality": "text", "value": "Which structure is the world's tallest building?" }, "options": [ { "modality": "text", "value": "Burj Khalifa" }, { "modality": "text", "value": "Shanghai Tower" }, { "modality": "text", "value": "One World Trade Center" }, { "modality": "text", "value": "Petronas Towers" } ], "correctIndex": 0, "explanation": "The Burj Khalifa, at 2,717 feet, is the tallest building in the world.", "source": { "label": "Fun with Numbers — Objective Test" }, "uid": "2kolwt13nrhcb" }, { "id": "ot-cov-physical-superlatives-6", "shape": "mcq", "tags": [ "geography", "superlatives", "buildings" ], "prompt": { "modality": "text", "value": "About how tall is the Burj Khalifa, the world's tallest building?" }, "options": [ { "modality": "text", "value": "2,073 ft" }, { "modality": "text", "value": "2,717 ft" }, { "modality": "text", "value": "1,776 ft" }, { "modality": "text", "value": "1,483 ft" } ], "correctIndex": 1, "explanation": "The Burj Khalifa rises about 2,717 feet, making it the tallest building on Earth.", "source": { "label": "Fun with Numbers — Objective Test" }, "uid": "1sblo9qr0ixpy" } ], "lessons": [ { "id": "l1-tall", "title": "Tall Things", "studyGuidePath": "/packs/world-numbers/guides/l1-tall.md", "parts": [ { "id": "l1-p1-towers", "title": "Skyscrapers and towers", "studyGuideAnchor": "skyscrapers-and-towers", "itemIds": [ "st-burj", "st-merdeka", "st-shanghai", "st-onewtc", "st-cntower", "st-empire", "st-eiffel", "ft-cntower", "mc-tallest", "ft-magnitudes", "cz-world-numbers-ft-cntower", "mcq-c-world-numbers-ft-cntower", "wn-mcq-burj-height", "wn-mcq-second-tallest", "wn-mcq-onewtc-1776", "wn-mcq-shanghai-height", "wn-mcq-cntower-height", "wn-mcq-empire-height", "wn-mcq-eiffel-height", "wn-mcq-tallest-iconic", "fact-supertall-podium-2000-feet", "fi-wn-mcq-onewtc-1776", "fi-mc-tallest" ], "order": 1 }, { "id": "l1-p2-monuments", "title": "Monuments and landmarks", "studyGuideAnchor": "monuments-and-landmarks", "itemIds": [ "st-liberty", "st-washmon", "st-arch", "st-pyramid", "st-hoover", "st-ggtower", "st-ggspan", "ft-tallest", "mcq-rw-l1-p2-monuments", "cz-world-numbers-ft-tallest", "concept-rw-world-numbers-statue-of-liberty", "concept-rw-world-numbers-washington-monument", "concept-rw-world-numbers-gateway-arch", "concept-rw-world-numbers-hoover-dam", "concept-rw-world-numbers-golden-gate-bridge", "wn-mcq-washmon-height", "wn-mcq-liberty-height", "wn-mcq-ggtowers-height", "wn-mcq-arch-height", "fact-landmark-ladder-under-750-feet", "fact-great-pyramid-4000-year-record", "fi-wn-mcq-washmon-height", "fi-wn-mcq-arch-height" ], "order": 2 }, { "id": "l1-p3-mountains", "title": "Mountains and peaks", "studyGuideAnchor": "mountains-and-peaks", "itemIds": [ "mn-everest", "mn-k2", "mn-aconcagua", "mn-denali", "mn-kilimanjaro", "mn-montblanc", "mn-maunakea", "mn-whitney", 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"obj-monument-heights", "statement": "Recall the heights of famous monuments, dams, bridges, and the record-holding Great Pyramid", "demonstrationIds": [ "d-monument-heights", "d-bridge-pyramid" ] }, { "id": "obj-mountain-heights", "statement": "Rank the world's highest mountains and each continent's high point", "demonstrationIds": [ "d-world-peaks", "d-continent-peaks" ] }, { "id": "obj-elevation-extremes", "statement": "Define elevation and recognize height curiosities such as Mauna Kea measured from the seafloor", "demonstrationIds": [ "d-elevation-def", "d-mauna-kea" ] } ], "demonstrations": [ { "id": "d-supertall", "label": "Tallest skyscrapers", "itemIds": [ "st-burj", "st-merdeka", "st-shanghai", "st-onewtc" ], "requiredCorrect": 3 }, { "id": "d-tallest-pick", "label": "Which is tallest", "itemIds": [ "mc-tallest", "cz-world-numbers-ft-tallest" ] }, { "id": "d-tower-heights", "label": "Iconic tower heights", "itemIds": [ "st-cntower", "st-empire", "st-eiffel" ] }, { "id": "d-cn-record", "label": "CN Tower's record", "itemIds": [ "cz-world-numbers-ft-cntower", "mcq-c-world-numbers-ft-cntower" ] }, { "id": "d-monument-heights", "label": "Monument and dam heights", "itemIds": [ "st-liberty", "st-washmon", "st-arch", "st-hoover" ], "requiredCorrect": 3 }, { "id": "d-bridge-pyramid", "label": "Bridge and pyramid", "itemIds": [ "st-ggtower", "st-ggspan", "st-pyramid", "mcq-rw-l1-p2-monuments" ], "requiredCorrect": 3 }, { "id": "d-world-peaks", "label": "Highest mountains", "itemIds": [ "mn-everest", "mn-k2", "mn-aconcagua", "mn-denali" ], "requiredCorrect": 3 }, { "id": "d-continent-peaks", "label": "Continental and US peaks", "itemIds": [ "mn-kilimanjaro", "mn-montblanc", "mn-whitney", "mn-fuji" ], "requiredCorrect": 3 }, { "id": "d-elevation-def", "label": "Elevation defined", "itemIds": [ "def-elevation", "cz-world-numbers-def-elevation", "tf-d-world-numbers-def-elevation" ] }, { "id": "d-mauna-kea", "label": "Mauna Kea curiosity", "itemIds": [ "mcq-rw-l1-p3-mountains", "mn-maunakea", "mn-pikes" ] } ], "objectiveTests": [ { "id": "test-wn-tall-buildings", "objectiveId": "obj-tallest-buildings", "title": "The Tallest Skyscrapers", "mcqIds": [ "wn-mcq-burj-height", "mc-tallest", "wn-mcq-second-tallest", "wn-mcq-onewtc-1776", "wn-mcq-shanghai-height" ] }, { "id": "test-wn-iconic-towers", "objectiveId": "obj-iconic-towers", "title": "Iconic Towers", "mcqIds": [ "wn-mcq-cntower-height", "mcq-c-world-numbers-ft-cntower", "wn-mcq-empire-height", "wn-mcq-eiffel-height", "wn-mcq-tallest-iconic" ] }, { "id": "test-wn-monuments", "objectiveId": "obj-monument-heights", "title": "Monuments & Landmarks", "mcqIds": [ "wn-mcq-washmon-height", "mcq-rw-l1-p2-monuments", "wn-mcq-liberty-height", "wn-mcq-ggtowers-height", "wn-mcq-arch-height" ] }, { "id": "test-wn-mountains", "objectiveId": "obj-mountain-heights", "title": "The Highest Mountains", "mcqIds": [ "wn-mcq-everest-height", "wn-mcq-second-highest", "wn-mcq-denali-continent", "wn-mcq-africa-highpoint", "wn-mcq-montblanc-range" ] }, { "id": "test-wn-elevation", "objectiveId": "obj-elevation-extremes", "title": "Elevation Extremes", "mcqIds": [ "wn-mcq-elevation-def", "wn-mcq-maunakea-abovesea", "mcq-rw-l1-p3-mountains", "wn-mcq-whitney-contiguous", "wn-mcq-everest-vs-maunakea-elevation" ] } ] }, { "id": "l2-earth", "title": "Planet Earth", "studyGuidePath": "/packs/world-numbers/guides/l2-earth.md", "parts": [ { "id": "l2-p1-water", "title": "Rivers, falls and ocean depths", "studyGuideAnchor": "rivers-falls-and-ocean-depths", "itemIds": [ "wt-nile", "wt-amazon", "wt-mississippi", "wf-angel", "wf-niagara", "wt-mariana", "wt-baikal", "wt-pacific", "ft-pacific", "cz-world-numbers-ft-pacific", "mcq-c-world-numbers-ft-pacific", "concept-rw-world-numbers-amazon-river", "concept-rw-world-numbers-angel-falls", "concept-rw-world-numbers-lake-baikal", "ot-rivers-1", "ot-rivers-2", "ot-rivers-3", "ot-rivers-4", "ot-rivers-5", "ot-depths-1", "ot-depths-2", "ot-depths-3", "ot-depths-4", "ot-idwater-1", "ot-idwater-2", "ot-idwater-3", "ot-idwater-4", "ot-idwater-5", "fact-nile-length-amazon-volume", "fact-angel-falls-to-challenger-deep", "fi-ot-rivers-3", "fi-ot-rivers-5" ], "order": 1 }, { "id": "l2-p2-land", "title": "Land and extremes", "studyGuideAnchor": "land-and-extremes", "itemIds": [ "wt-grandcanyon", "wt-deadsea", "wt-sahara", "wt-greatwall", "wt-russia", "wt-alaska", "mcq-rw-l2-p2-land", "ot-land-1", "ot-land-2", "ot-land-3", "ot-land-4", "fact-russia-sahara-alaska-scale", "fact-great-wall-half-the-planet", "fact-grand-canyon-and-dead-sea", "fi-ot-land-4", "fi-ot-land-1" ], "order": 2 }, { "id": "l2-p3-distances", "title": "Distances and journeys", "studyGuideAnchor": "distances-and-journeys", "itemIds": [ "ds-circumference", "ds-nyc-la", "ds-coast", "ds-route66", "ds-singapore", "ds-channel", "ds-countries", "ft-route66", "cz-world-numbers-ft-route66", "mcq-c-world-numbers-ft-route66", "ot-dist-1", "ot-dist-2", "ot-dist-3", "ot-dist-4", "ot-dist-5", "fact-longest-nonstop-flight", "fact-channel-21-miles-195-countries", "fi-ot-dist-1", "fi-ot-dist-5" ], "order": 3 } ], "order": 2, "objectives": [ { "id": "obj-rivers-falls", "statement": "Compare the lengths of the world's longest rivers and the heights of its great waterfalls", "demonstrationIds": [ "d-rivers", "d-waterfalls" ] }, { "id": "obj-ocean-depths", "statement": "Recall the depths of the ocean and the deepest lake, and why the Pacific holds so much water", "demonstrationIds": [ "d-depths", "d-pacific-vast" ] }, { "id": "obj-identify-waters", "statement": "Identify famous bodies of water from their defining facts", "demonstrationIds": [ "d-water-concepts" ] }, { "id": "obj-land-extremes", "statement": "Recall the scale of Earth's great land features and its largest country and US state", "demonstrationIds": [ "d-land-features", "d-largest-countries" ] }, { "id": "obj-distances-journeys", "statement": "Estimate the great distances of travel across the US and around the world", "demonstrationIds": [ "d-us-crossings", "d-world-spans" ] } ], "demonstrations": [ { "id": "d-rivers", "label": "Longest rivers", "itemIds": [ "wt-nile", "wt-amazon", "wt-mississippi" ] }, { "id": "d-waterfalls", "label": "Waterfall heights", "itemIds": [ "wf-angel", "wf-niagara" ] }, { "id": "d-depths", "label": "Ocean and lake depths", "itemIds": [ "wt-mariana", "wt-baikal", "wt-pacific" ] }, { "id": "d-pacific-vast", "label": "The vast Pacific", "itemIds": [ "cz-world-numbers-ft-pacific", "mcq-c-world-numbers-ft-pacific" ] }, { "id": "d-water-concepts", "label": "Identify famous waters", "itemIds": [ "concept-rw-world-numbers-amazon-river", "concept-rw-world-numbers-angel-falls", "concept-rw-world-numbers-lake-baikal" ] }, { "id": "d-land-features", "label": "Great land features", "itemIds": [ "wt-grandcanyon", "wt-deadsea", "wt-sahara", "wt-greatwall" ], "requiredCorrect": 3 }, { "id": "d-largest-countries", "label": "Largest country and state", "itemIds": [ "wt-russia", "wt-alaska", "mcq-rw-l2-p2-land" ] }, { "id": "d-us-crossings", "label": "Crossing the US and the globe", "itemIds": [ "ds-nyc-la", "ds-coast", "ds-route66", "ds-circumference" ], "requiredCorrect": 3 }, { "id": "d-world-spans", "label": "World spans", "itemIds": [ "ds-singapore", "ds-channel", "ds-countries", "cz-world-numbers-ft-route66" ], "requiredCorrect": 3 } ], "objectiveTests": [ { "id": "test-rivers-falls", "objectiveId": "obj-rivers-falls", "title": "Rivers & Waterfalls", "mcqIds": [ "ot-rivers-1", "ot-rivers-2", "ot-rivers-3", "ot-rivers-4", "ot-rivers-5" ] }, { "id": "test-ocean-depths", "objectiveId": "obj-ocean-depths", "title": "Ocean & Lake Depths", "mcqIds": [ "mcq-c-world-numbers-ft-pacific", "ot-depths-1", "ot-depths-2", "ot-depths-3", "ot-depths-4" ] }, { "id": "test-identify-waters", "objectiveId": "obj-identify-waters", "title": "Identify Famous Waters", "mcqIds": [ "ot-idwater-1", "ot-idwater-2", "ot-idwater-3", "ot-idwater-4", "ot-idwater-5" ] }, { "id": "test-land-extremes", "objectiveId": "obj-land-extremes", "title": "Land Features & Sizes", "mcqIds": [ "mcq-rw-l2-p2-land", "ot-land-1", "ot-land-2", "ot-land-3", "ot-land-4" ] }, { "id": "test-distances-journeys", "objectiveId": "obj-distances-journeys", "title": "Great Distances", "mcqIds": [ "ot-dist-1", "ot-dist-2", "ot-dist-3", "ot-dist-4", "ot-dist-5" ] } ] }, { "id": "l3-people", "title": "People and Places", "studyGuidePath": "/packs/world-numbers/guides/l3-people.md", "parts": [ { "id": "l3-p1-cities", "title": "The world's biggest cities", "studyGuideAnchor": "the-world-s-biggest-cities", "itemIds": [ "pp-tokyo", "pp-mumbai", "pp-cairo", "pp-saopaulo", "pp-london", "pp-nyc", "mc-bigcity", "concept-rw-world-numbers-greater-tokyo", "concept-rw-world-numbers-s-o-paulo", "concept-rw-world-numbers-london", "concept-rw-world-numbers-new-york-city", "concept-rw-world-numbers-sydney", "ot-megacities-tokyo-num", "ot-megacities-magnitude", "ot-megacities-canada", "ot-megacities-not", "ot-west-london-num", "ot-west-sydney-num", "ot-west-largest", "ot-west-tokyo-compare", "ot-id-tokyo", "ot-id-saopaulo", "ot-id-london", "ot-id-nyc", "ot-id-sydney", "fact-tokyo-is-four-londons", "fact-twenty-million-club", "fact-western-cities-ranked", "fi-ot-megacities-canada", "fi-ot-megacities-magnitude", "ot-cov-obj-megacities-1" ], "order": 1 }, { "id": "l3-p2-nations", "title": "Cities and nations", "studyGuideAnchor": "cities-and-nations", "itemIds": [ "pp-paris", "pp-sydney", "pp-world", "pp-us", "pp-india", "pp-china", "ft-india-europe", "def-population", "mcq-rw-l3-p2-nations", "cz-world-numbers-def-population", "tf-d-world-numbers-def-population", "ot-west-smallest", "ot-nations-most", "ot-nations-us-rank", "ot-nations-world-num", "ot-nations-india-num", "ot-pop-def", "ot-pop-overtook", "ot-pop-threshold", "ot-pop-us-fraction", "ot-pop-europe", "fact-first-billion-took-until-1804", "fact-india-passed-china", "fi-ot-west-smallest", "fi-ot-nations-world-num" ], "order": 2 } ], "order": 3, "objectives": [ { "id": "obj-megacities", "statement": "Rank the populations of the world's biggest metro areas and identify the largest", "demonstrationIds": [ "d-city-pops", "d-biggest-city" ] }, { "id": "obj-western-cities", "statement": "Recall the populations of major Western cities: London, New York, Paris, and Sydney", "demonstrationIds": [ "d-west-pops" ] }, { "id": "obj-identify-cities", "statement": "Identify major world cities from their population and profile", "demonstrationIds": [ "d-city-concepts-a", "d-city-concepts-b" ] }, { "id": "obj-populous-nations", "statement": "Compare the populations of the world's most populous countries and the planet as a whole", "demonstrationIds": [ "d-nation-pops", "d-world-pop" ] }, { "id": "obj-define-population", "statement": "Define population as the total number of people living in a place", "demonstrationIds": [ "d-population-def" ] } ], "demonstrations": [ { "id": "d-city-pops", "label": "Megacity populations", "itemIds": [ "pp-tokyo", "pp-mumbai", "pp-cairo", "pp-saopaulo", "ot-cov-obj-megacities-1" ], "requiredCorrect": 3 }, { "id": "d-biggest-city", "label": "Which metro is biggest", "itemIds": [ "mc-bigcity", "pp-tokyo", "pp-london", "pp-nyc" ], "requiredCorrect": 3 }, { "id": "d-west-pops", "label": "Western city populations", "itemIds": [ "pp-london", "pp-nyc", "pp-paris", "pp-sydney" ], "requiredCorrect": 3 }, { "id": "d-city-concepts-a", "label": "Identify cities I", "itemIds": [ "concept-rw-world-numbers-greater-tokyo", "concept-rw-world-numbers-s-o-paulo", "concept-rw-world-numbers-sydney" ] }, { "id": "d-city-concepts-b", "label": "Identify cities II", "itemIds": [ "concept-rw-world-numbers-london", "concept-rw-world-numbers-new-york-city" ] }, { "id": "d-nation-pops", "label": "Most populous countries", "itemIds": [ "pp-india", "pp-china", "pp-us" ] }, { "id": "d-world-pop", "label": "World population milestones", "itemIds": [ "pp-world", "mcq-rw-l3-p2-nations" ] }, { "id": "d-population-def", "label": "Population defined", "itemIds": [ "def-population", "cz-world-numbers-def-population", "tf-d-world-numbers-def-population" ] } ], "objectiveTests": [ { "id": "test-megacities", "objectiveId": "obj-megacities", "title": "World's Biggest Cities", "mcqIds": [ "mc-bigcity", "ot-megacities-tokyo-num", "ot-megacities-magnitude", "ot-megacities-canada", "ot-megacities-not", "ot-cov-obj-megacities-1" ] }, { "id": "test-western-cities", "objectiveId": "obj-western-cities", "title": "Western City Populations", "mcqIds": [ "ot-west-london-num", "ot-west-sydney-num", "ot-west-largest", "ot-west-smallest", "ot-west-tokyo-compare" ] }, { "id": "test-identify-cities", "objectiveId": "obj-identify-cities", "title": "Identify World Cities", "mcqIds": [ "ot-id-tokyo", "ot-id-saopaulo", "ot-id-london", "ot-id-nyc", "ot-id-sydney" ] }, { "id": "test-populous-nations", "objectiveId": "obj-populous-nations", "title": "Most Populous Nations", "mcqIds": [ "mcq-rw-l3-p2-nations", "ot-nations-most", "ot-nations-us-rank", "ot-nations-world-num", "ot-nations-india-num" ] }, { "id": "test-define-population", "objectiveId": "obj-define-population", "title": "Defining Population", "mcqIds": [ "ot-pop-def", "ot-pop-overtook", "ot-pop-threshold", "ot-pop-us-fraction", "ot-pop-europe" ] } ] }, { "id": "l4-space", "title": "Space and Astronomy", "studyGuidePath": "/packs/world-numbers/guides/l4-space.md", "parts": [ { "id": "l4-p1-distances", "title": "Cosmic distances", "studyGuideAnchor": "cosmic-distances", "itemIds": [ "sp-earthmoon", "sp-au", "sp-lightyear", "sp-mars", "sp-iss", "sp-earthdia", "def-light-year", "mcq-rw-l4-p1-distances", "cz-world-numbers-def-light-year", "tf-df-world-numbers-def-light-year", "concept-rw-world-numbers-moon", "concept-rw-world-numbers-mars", "ot-cosmicdist-1", "ot-cosmicdist-2", "ot-cosmicdist-3", "ot-cosmicdist-4", "ot-lightyear-1", "ot-lightyear-2", "ot-lightyear-3", "ot-lightyear-4", "ot-lightyear-5", "fact-moon-three-day-trip", "fact-au-solar-system-yardstick", "fact-light-year-is-a-distance", "fi-ot-cosmicdist-3", "fi-ot-cosmicdist-4" ], "order": 1 }, { "id": "l4-p2-sizes", "title": "Sizes, speeds and counts", "studyGuideAnchor": "sizes-speeds-and-counts", "itemIds": [ "sp-lightspeed", "sp-sundia", "sp-jupiter", "sp-issspeed", "sp-universe", "sp-planets", "ft-iss", "def-magnitude", "cz-world-numbers-def-magnitude", "cz-world-numbers-ft-iss", "mcq-c-world-numbers-ft-iss", "tf-df-world-numbers-def-magnitude", "concept-rw-world-numbers-sun", "concept-rw-world-numbers-jupiter", "ot-sizespeed-1", "ot-sizespeed-2", "ot-sizespeed-3", "ot-sizespeed-4", "ot-sizespeed-5", "ot-issorbit-1", "ot-issorbit-2", "ot-issorbit-3", "ot-issorbit-4", "ot-maggiant-1", "ot-maggiant-2", "ot-maggiant-3", "ot-maggiant-4", "ot-maggiant-5", "fact-light-speed-cosmic-limit", "fact-sun-dwarfs-everything", "fi-ot-sizespeed-2", "fi-ot-sizespeed-4", "ot-cov-obj-cosmic-sizes-speeds-1", "ot-cov-obj-cosmic-sizes-speeds-2" ], "order": 2 } ], "order": 4, "objectives": [ { "id": "obj-cosmic-distances", "statement": "Recall the distances to the Moon, Sun, and Mars and the near-Earth reference scales", "demonstrationIds": [ "d-distances-far", "d-distances-near" ] }, { "id": "obj-define-light-year", "statement": "Define the light-year and identify the Moon and Mars", "demonstrationIds": [ "d-lightyear-def", "d-space-places" ] }, { "id": "obj-cosmic-sizes-speeds", "statement": "Recall the extreme sizes and speeds of the Sun, Jupiter, light, and the age and planet count of the cosmos", "demonstrationIds": [ "d-sizes-speeds", "d-universe-planets" ] }, { "id": "obj-iss-orbit", "statement": "Recall how fast the International Space Station circles the Earth", "demonstrationIds": [ "d-iss-orbit" ] }, { "id": "obj-magnitude-giants", "statement": "Define magnitude and identify the solar system's largest bodies", "demonstrationIds": [ "d-magnitude-def", "d-identify-giants" ] } ], "demonstrations": [ { "id": "d-distances-far", "label": "Distances out from Earth", "itemIds": [ "sp-earthmoon", "sp-au", "sp-mars", "sp-lightyear" ], "requiredCorrect": 3 }, { "id": "d-distances-near", "label": "Near-Earth reference scales", "itemIds": [ "sp-iss", "sp-earthdia", "mcq-rw-l4-p1-distances" ] }, { "id": "d-lightyear-def", "label": "Light-year defined", "itemIds": [ "def-light-year", "cz-world-numbers-def-light-year", "tf-df-world-numbers-def-light-year" ] }, { "id": "d-space-places", "label": "Identify Moon and Mars", "itemIds": [ "concept-rw-world-numbers-moon", "concept-rw-world-numbers-mars" ] }, { "id": "d-sizes-speeds", "label": "Cosmic sizes and speeds", "itemIds": [ "sp-lightspeed", "sp-sundia", "sp-jupiter", "sp-issspeed", "ot-cov-obj-cosmic-sizes-speeds-1", "ot-cov-obj-cosmic-sizes-speeds-2" ], "requiredCorrect": 3 }, { "id": "d-universe-planets", "label": "Age and planet count", "itemIds": [ "sp-universe", "sp-planets" ] }, { "id": "d-iss-orbit", "label": "The ISS's orbit", "itemIds": [ "cz-world-numbers-ft-iss", "mcq-c-world-numbers-ft-iss", "sp-issspeed" ] }, { "id": "d-magnitude-def", "label": "Magnitude defined", "itemIds": [ "def-magnitude", "cz-world-numbers-def-magnitude", "tf-df-world-numbers-def-magnitude" ] }, { "id": "d-identify-giants", "label": "Identify Sun and Jupiter", "itemIds": [ "concept-rw-world-numbers-sun", "concept-rw-world-numbers-jupiter" ] } ], "objectiveTests": [ { "id": "test-cosmic-distances", "objectiveId": "obj-cosmic-distances", "title": "Cosmic Distances", "mcqIds": [ "mcq-rw-l4-p1-distances", "ot-cosmicdist-1", "ot-cosmicdist-2", "ot-cosmicdist-3", "ot-cosmicdist-4" ] }, { "id": "test-define-light-year", "objectiveId": "obj-define-light-year", "title": "The Light-Year", "mcqIds": [ "ot-lightyear-1", "ot-lightyear-2", "ot-lightyear-3", "ot-lightyear-4", "ot-lightyear-5" ] }, { "id": "test-cosmic-sizes-speeds", "objectiveId": "obj-cosmic-sizes-speeds", "title": "Sizes, Speeds & Counts", "mcqIds": [ "ot-sizespeed-1", "ot-sizespeed-2", "ot-sizespeed-3", "ot-sizespeed-4", "ot-sizespeed-5", "ot-cov-obj-cosmic-sizes-speeds-1", "ot-cov-obj-cosmic-sizes-speeds-2" ] }, { "id": "test-iss-orbit", "objectiveId": "obj-iss-orbit", "title": "ISS Orbit", "mcqIds": [ "mcq-c-world-numbers-ft-iss", "ot-issorbit-1", "ot-issorbit-2", "ot-issorbit-3", "ot-issorbit-4" ] }, { "id": "test-magnitude-giants", "objectiveId": "obj-magnitude-giants", "title": "Magnitude & Giants", "mcqIds": [ "ot-maggiant-1", "ot-maggiant-2", "ot-maggiant-3", "ot-maggiant-4", "ot-maggiant-5" ] } ] }, { "id": "l5-money", "title": "Money and the Economy", "studyGuidePath": "/packs/world-numbers/guides/l5-money.md", "parts": [ { "id": "l5-p1-bigmoney", "title": "Big money", "studyGuideAnchor": "big-money", "itemIds": [ "mo-debt", "mo-usgdp", "mo-worldgdp", "mo-budget", "mo-nvidia", "mo-richest", "mo-home", "mo-carrier", "ft-debt", "def-gdp", "cz-world-numbers-def-gdp", "cz-world-numbers-ft-debt", "mcq-c-world-numbers-ft-debt", "tf-d-world-numbers-def-gdp", "concept-rw-world-numbers-us-national-debt", "concept-rw-world-numbers-us-gdp", "concept-rw-world-numbers-world-gdp", "concept-rw-world-numbers-us-federal-budget", "ot-natscale-debt", "ot-natscale-worldgdp", "ot-natscale-budget", "ot-natscale-rank", "ot-gdp-acronym", "ot-gdp-measures", "ot-gdp-largest", "ot-gdp-period", "ot-gdp-not", "ot-wealth-company", "ot-wealth-nvidia-val", "ot-wealth-richest", "ot-wealth-home", "ot-wealth-carrier", "ot-agg-annual", "ot-agg-debt-vs-output", "ot-agg-budget-def", "ot-agg-debt-cumulative", "ot-agg-not-aggregate", "fact-billion-vs-trillion-gap", "fact-world-gdp-110-trillion", "fi-ot-natscale-budget", "fi-ot-gdp-measures", "ot-cov-wealth-scales-1", "ot-cov-wealth-scales-2", "ot-cov-wealth-scales-3", "ot-cov-wealth-scales-4", "ot-cov-identify-aggregates-1", "ot-cov-identify-aggregates-2" ], "order": 1 } ], "order": 5, "objectives": [ { "id": "obj-national-scales", "statement": "Compare the trillion-dollar scales of US debt, US GDP, the federal budget, and world GDP", "demonstrationIds": [ "d-us-macro", "d-debt-vs-gdp" ] }, { "id": "obj-define-gdp", "statement": "Define GDP and recognize what it measures", "demonstrationIds": [ "d-gdp-def" ] }, { "id": "obj-wealth-scales", "statement": "Recall the scale of the most valuable company, the richest person, and everyday costs", "demonstrationIds": [ "d-wealth" ] }, { "id": "obj-identify-aggregates", "statement": "Identify the major economic aggregates and distinguish national debt from annual output", "demonstrationIds": [ "d-econ-concepts" ] } ], "demonstrations": [ { "id": "d-us-macro", "label": "Trillion-dollar aggregates", "itemIds": [ "mo-debt", "mo-usgdp", "mo-budget", "mo-worldgdp" ], "requiredCorrect": 3 }, { "id": "d-debt-vs-gdp", "label": "Debt vs. the economy", "itemIds": [ "cz-world-numbers-ft-debt", "mcq-c-world-numbers-ft-debt" ] }, { "id": "d-gdp-def", "label": "GDP defined", "itemIds": [ "def-gdp", "cz-world-numbers-def-gdp", "tf-d-world-numbers-def-gdp" ] }, { "id": "d-wealth", "label": "Corporate, personal and everyday costs", "itemIds": [ "mo-nvidia", "mo-richest", "mo-home", "mo-carrier", "ot-cov-wealth-scales-1", "ot-cov-wealth-scales-2", "ot-cov-wealth-scales-3", "ot-cov-wealth-scales-4" ], "requiredCorrect": 3 }, { "id": "d-econ-concepts", "label": "Identify economic aggregates", "itemIds": [ "concept-rw-world-numbers-us-national-debt", "concept-rw-world-numbers-us-gdp", "concept-rw-world-numbers-world-gdp", "concept-rw-world-numbers-us-federal-budget", "ot-cov-identify-aggregates-1", "ot-cov-identify-aggregates-2" ], "requiredCorrect": 3 } ], "objectiveTests": [ { "id": "test-national-scales", "objectiveId": "obj-national-scales", "title": "Trillion-dollar scales", "mcqIds": [ "mcq-c-world-numbers-ft-debt", "ot-natscale-debt", "ot-natscale-worldgdp", "ot-natscale-budget", "ot-natscale-rank" ] }, { "id": "test-define-gdp", "objectiveId": "obj-define-gdp", "title": "Defining GDP", "mcqIds": [ "ot-gdp-acronym", "ot-gdp-measures", "ot-gdp-largest", "ot-gdp-period", "ot-gdp-not" ] }, { "id": "test-wealth-scales", "objectiveId": "obj-wealth-scales", "title": "Wealth and everyday costs", "mcqIds": [ "ot-wealth-company", "ot-wealth-nvidia-val", "ot-wealth-richest", "ot-wealth-home", "ot-wealth-carrier", "ot-cov-wealth-scales-1", "ot-cov-wealth-scales-2", "ot-cov-wealth-scales-3", "ot-cov-wealth-scales-4" ] }, { "id": "test-identify-aggregates", "objectiveId": "obj-identify-aggregates", "title": "Economic aggregates", "mcqIds": [ "ot-agg-annual", "ot-agg-debt-vs-output", "ot-agg-budget-def", "ot-agg-debt-cumulative", "ot-agg-not-aggregate", "ot-cov-identify-aggregates-1", "ot-cov-identify-aggregates-2" ] } ] }, { "id": "l6-usa", "title": "USA by the Numbers", "studyGuidePath": "/packs/world-numbers/guides/l6-usa.md", "parts": [ { "id": "l6-p1-gov", "title": "Government and the Constitution", "studyGuideAnchor": "government-and-the-constitution", "itemIds": [ "us-presidents", "us-senators", "us-house", "us-electoral", "us-term", "us-constitution", "us-amendments", "ft-house", "cz-world-numbers-ft-house", "mcq-c-world-numbers-ft-house", "concept-rw-world-numbers-us-constitution", "concept-rw-world-numbers-electoral-college", "concept-rw-world-numbers-senate", "concept-rw-world-numbers-house-of-representatives", "ot-congress-senators", "ot-congress-house-body", "ot-congress-ev-win", "ot-congress-ev-total", "ot-pres-count", "ot-pres-term", "ot-const-ratified", "ot-const-amendments", "ot-pres-nonconsec", "ot-inst-electoral", "ot-inst-senate", "ot-inst-constitution", "ot-inst-house", "ot-inst-not-institution", "fact-47-presidencies-45-people", "fact-where-538-comes-from", "fi-ot-congress-ev-win", "fi-ot-pres-term" ], "order": 1 }, { "id": "l6-p2-symbols", "title": "States, symbols and rules", "studyGuideAnchor": "states-symbols-and-rules", "itemIds": [ "us-states", "us-parks", "us-stars", "us-stripes", "us-votingage", "us-presage", "mcq-rw-l6-p2-symbols", "concept-rw-world-numbers-national-park-system", "ot-flag-states", "ot-flag-stars", "ot-flag-stripes-count", "ot-flag-parks", "ot-age-vote", "ot-age-pres", "ot-age-which-amendment", "ot-age-former", "ot-age-diff", "fact-flag-two-counts", "fact-63-parks-among-hundreds", "fact-18-to-vote-35-to-run", "fi-ot-flag-states", "fi-ot-age-vote", "ot-cov-flag-states-1", "ot-cov-flag-states-2", "ot-cov-flag-states-3", "ot-cov-flag-states-4" ], "order": 2 } ], "order": 6, "objectives": [ { "id": "obj-congress-numbers", "statement": "Recall the fixed sizes of Congress and the Electoral College, and why the House is capped at 435", "demonstrationIds": [ "d-congress", "d-house-cap" ] }, { "id": "obj-presidency-constitution", "statement": "Recall the key figures of the presidency and the US Constitution", "demonstrationIds": [ "d-pres-const" ] }, { "id": "obj-identify-institutions", "statement": "Identify the core institutions of the US government", "demonstrationIds": [ "d-gov-concepts" ] }, { "id": "obj-flag-states", "statement": "Recall the counts on the flag and the number of states and national parks, and what the stripes represent", "demonstrationIds": [ "d-flag", "d-parks" ] }, { "id": "obj-civic-ages", "statement": "Recall the constitutional age thresholds for voting and for becoming president", "demonstrationIds": [ "d-ages" ] } ], "demonstrations": [ { "id": "d-congress", "label": "Congress and Electoral College sizes", "itemIds": [ "us-senators", "us-house", "us-electoral" ] }, { "id": "d-house-cap", "label": "The 435-member cap", "itemIds": [ "cz-world-numbers-ft-house", "mcq-c-world-numbers-ft-house" ] }, { "id": "d-pres-const", "label": "Presidency and Constitution figures", "itemIds": [ "us-presidents", "us-term", "us-constitution", "us-amendments" ], "requiredCorrect": 3 }, { "id": "d-gov-concepts", "label": "Identify institutions", "itemIds": [ "concept-rw-world-numbers-us-constitution", "concept-rw-world-numbers-electoral-college", "concept-rw-world-numbers-senate", "concept-rw-world-numbers-house-of-representatives" ], "requiredCorrect": 3 }, { "id": "d-flag", "label": "States, stars and stripes", "itemIds": [ "us-states", "us-stars", "us-stripes", "mcq-rw-l6-p2-symbols", "ot-cov-flag-states-1", "ot-cov-flag-states-2", "ot-cov-flag-states-3", "ot-cov-flag-states-4" ], "requiredCorrect": 3 }, { "id": "d-parks", "label": "National parks", "itemIds": [ "us-parks", "concept-rw-world-numbers-national-park-system" ] }, { "id": "d-ages", "label": "Civic age thresholds", "itemIds": [ "us-votingage", "us-presage" ] } ], "objectiveTests": [ { "id": "test-congress-numbers", "objectiveId": "obj-congress-numbers", "title": "Congress & Electoral College sizes", "mcqIds": [ "mcq-c-world-numbers-ft-house", "ot-congress-senators", "ot-congress-house-body", "ot-congress-ev-win", "ot-congress-ev-total" ] }, { "id": "test-presidency-constitution", "objectiveId": "obj-presidency-constitution", "title": "Presidency & the Constitution", "mcqIds": [ "ot-pres-count", "ot-pres-term", "ot-const-ratified", "ot-const-amendments", "ot-pres-nonconsec" ] }, { "id": "test-identify-institutions", "objectiveId": "obj-identify-institutions", "title": "Core US institutions", "mcqIds": [ "ot-inst-electoral", "ot-inst-senate", "ot-inst-constitution", "ot-inst-house", "ot-inst-not-institution" ] }, { "id": "test-flag-states", "objectiveId": "obj-flag-states", "title": "Flag, states & parks", "mcqIds": [ "mcq-rw-l6-p2-symbols", "ot-flag-states", "ot-flag-stars", "ot-flag-stripes-count", "ot-flag-parks", "ot-cov-flag-states-1", "ot-cov-flag-states-2", "ot-cov-flag-states-3", "ot-cov-flag-states-4" ] }, { "id": "test-civic-ages", "objectiveId": "obj-civic-ages", "title": "Civic age thresholds", "mcqIds": [ "ot-age-vote", "ot-age-pres", "ot-age-which-amendment", "ot-age-former", "ot-age-diff" ] } ] }, { "id": "l7-records", "title": "Records and the Human Body", "studyGuidePath": "/packs/world-numbers/guides/l7-records.md", "parts": [ { "id": "l7-p1-records", "title": "Records and curiosities", "studyGuideAnchor": "records-and-curiosities", "itemIds": [ "rc-bones", "rc-heartbeats", "rc-cheetah", "rc-whale", "rc-scuba", "rc-freedive", "rc-hottest", "rc-bolt", "ft-heart", "def-wingspan", "mcq-rw-l7-p1-records", "cz-world-numbers-def-wingspan", "tf-d-world-numbers-def-wingspan", "concept-rw-world-numbers-cheetah", "concept-rw-world-numbers-blue-whale", "ot-human-body-1", "ot-human-body-2", "ot-human-body-3", "ot-human-body-4", "ot-animal-records-1", "ot-animal-records-2", "ot-animal-records-3", "ot-animal-records-4", "ot-animal-records-5", "ot-human-extremes-1", "ot-human-extremes-2", "ot-human-extremes-3", "ot-human-extremes-4", "ot-human-extremes-5", "ot-wingspan-def", "ot-wingspan-holder", "ot-wingspan-metres", "ot-wingspan-not", "ot-wingspan-apply", "fact-blue-whale-and-cheetah-records", "fact-human-extremes-depth-and-heat", "fi-ot-human-body-2", "fi-ot-animal-records-1" ], "order": 1 } ], "order": 7, "objectives": [ { "id": "obj-human-body", "statement": "Recall the astonishing numbers of the human body: its bones and daily heartbeats", "demonstrationIds": [ "d-body" ] }, { "id": "obj-animal-records", "statement": "Recall the record extremes of the animal kingdom and identify the record-holders", "demonstrationIds": [ "d-animals", "d-animal-concepts" ] }, { "id": "obj-human-extremes", "statement": "Recall the limits of human performance in diving and sprint speed", "demonstrationIds": [ "d-human-extremes" ] }, { "id": "obj-define-wingspan", "statement": "Define wingspan as the distance between a bird's outstretched wingtips", "demonstrationIds": [ "d-wingspan-def" ] } ], "demonstrations": [ { "id": "d-body", "label": "The human body in numbers", "itemIds": [ "rc-bones", "rc-heartbeats", "mcq-rw-l7-p1-records" ] }, { "id": "d-animals", "label": "Animal record extremes", "itemIds": [ "rc-cheetah", "rc-whale" ] }, { "id": "d-animal-concepts", "label": "Identify record animals", "itemIds": [ "concept-rw-world-numbers-cheetah", "concept-rw-world-numbers-blue-whale" ] }, { "id": "d-human-extremes", "label": "Limits of human performance", "itemIds": [ "rc-scuba", "rc-freedive", "rc-bolt" ], "requiredCorrect": 3 }, { "id": "d-wingspan-def", "label": "Wingspan defined", "itemIds": [ "def-wingspan", "cz-world-numbers-def-wingspan", "tf-d-world-numbers-def-wingspan" ] } ], "objectiveTests": [ { "id": "test-human-body", "objectiveId": "obj-human-body", "title": "The Human Body in Numbers", "mcqIds": [ "mcq-rw-l7-p1-records", "ot-human-body-1", "ot-human-body-2", "ot-human-body-3", "ot-human-body-4" ] }, { "id": "test-animal-records", "objectiveId": "obj-animal-records", "title": "Animal Kingdom Records", "mcqIds": [ "ot-animal-records-1", "ot-animal-records-2", "ot-animal-records-3", "ot-animal-records-4", "ot-animal-records-5" ] }, { "id": "test-human-extremes", "objectiveId": "obj-human-extremes", "title": "Limits of Human Performance", "mcqIds": [ "ot-human-extremes-1", "ot-human-extremes-2", "ot-human-extremes-3", "ot-human-extremes-4", "ot-human-extremes-5" ] }, { "id": "test-wingspan", "objectiveId": "obj-define-wingspan", "title": "Wingspan and the Albatross", "mcqIds": [ "ot-wingspan-def", "ot-wingspan-holder", "ot-wingspan-metres", "ot-wingspan-not", "ot-wingspan-apply" ] } ] }, { "id": "l8-recall", "title": "Quick Recall", "studyGuidePath": "/packs/world-numbers/guides/l8-recall.md", "parts": [ { "id": "l8-p1-superlatives", "title": "Superlatives", "studyGuideAnchor": "superlatives", "itemIds": [ "pr-tallest-mtn", "pr-longest-river", "pr-tallest-building", "pr-deepest-ocean", "pr-largest-country", "pr-most-populous", "pr-closest-star", "pr-fastest-animal", "pr-most-valuable-co", "pr-presidents", "mcq-rw-l8-p1-superlatives", "concept-rw-world-numbers-mariana-trench", "concept-rw-world-numbers-nile-river", "concept-rw-world-numbers-russia", "concept-rw-world-numbers-india", "ot-phys-tallest-mtn", "ot-phys-deepest-ocean", "ot-phys-longest-river", "ot-phys-not-paired", "ot-geo-largest-country", "ot-geo-most-populous", "ot-geo-presidents", "ot-geo-trump-count", "ot-geo-not-paired", "ot-sci-closest-star", "ot-sci-fastest-animal", "ot-sci-valuable-co", "ot-sci-nvidia-driver", "ot-sci-not-paired", "fact-trench-deeper-than-everest-is-tall", "fact-russia-india-and-47-presidents", "fact-closest-star-and-most-valuable-company", "fi-ot-phys-longest-river", "fi-ot-phys-not-paired", "ot-cov-physical-superlatives-1", "ot-cov-physical-superlatives-2", "ot-cov-physical-superlatives-3", "ot-cov-physical-superlatives-4", "ot-cov-physical-superlatives-5", "ot-cov-physical-superlatives-6" ], "order": 1 } ], "order": 8, "objectives": [ { "id": "obj-physical-superlatives", "statement": "Match Earth's physical extremes — tallest mountain, deepest ocean, longest river, tallest building — to their record-holders", "demonstrationIds": [ "d-physical-pairs", "d-everest-vs-trench" ] }, { "id": "obj-geopolitical-superlatives", "statement": "Match the largest country, the most populous country, and the US president count to their answers", "demonstrationIds": [ "d-geo-pairs", "d-country-concepts" ] }, { "id": "obj-science-economy-superlatives", "statement": "Match the closest star, the fastest land animal, and the most valuable company to their record-holders", "demonstrationIds": [ "d-sci-econ-pairs" ] } ], "demonstrations": [ { "id": "d-physical-pairs", "label": "Physical superlatives", "itemIds": [ "pr-tallest-mtn", "pr-deepest-ocean", "pr-longest-river", "pr-tallest-building", "ot-cov-physical-superlatives-1", "ot-cov-physical-superlatives-2", "ot-cov-physical-superlatives-3", "ot-cov-physical-superlatives-4", "ot-cov-physical-superlatives-5", "ot-cov-physical-superlatives-6" ], "requiredCorrect": 3 }, { "id": "d-everest-vs-trench", "label": "Deepest vs. tallest", "itemIds": [ "mcq-rw-l8-p1-superlatives", "concept-rw-world-numbers-mariana-trench", "concept-rw-world-numbers-nile-river" ] }, { "id": "d-geo-pairs", "label": "Geopolitical superlatives", "itemIds": [ "pr-largest-country", "pr-most-populous", "pr-presidents" ] }, { "id": "d-country-concepts", "label": "Identify Russia and India", "itemIds": [ "concept-rw-world-numbers-russia", "concept-rw-world-numbers-india" ] }, { "id": "d-sci-econ-pairs", "label": "Science and economy superlatives", "itemIds": [ "pr-closest-star", "pr-fastest-animal", "pr-most-valuable-co" ] } ], "objectiveTests": [ { "id": "test-physical-superlatives", "objectiveId": "obj-physical-superlatives", "title": "Earth's Physical Extremes", "mcqIds": [ "mcq-rw-l8-p1-superlatives", "ot-phys-tallest-mtn", "ot-phys-deepest-ocean", "ot-phys-longest-river", "ot-phys-not-paired", "ot-cov-physical-superlatives-1", "ot-cov-physical-superlatives-2", "ot-cov-physical-superlatives-3", "ot-cov-physical-superlatives-4", "ot-cov-physical-superlatives-5" ] }, { "id": "test-geopolitical-superlatives", "objectiveId": "obj-geopolitical-superlatives", "title": "Countries & Presidents", "mcqIds": [ "ot-geo-largest-country", "ot-geo-most-populous", "ot-geo-presidents", "ot-geo-trump-count", "ot-geo-not-paired" ] }, { "id": "test-science-economy-superlatives", "objectiveId": "obj-science-economy-superlatives", "title": "Star, Animal & Company", "mcqIds": [ "ot-sci-closest-star", "ot-sci-fastest-animal", "ot-sci-valuable-co", "ot-sci-nvidia-driver", "ot-sci-not-paired" ] } ] }, { "id": "l-key-concepts", "title": "Key Concepts", "order": 99, "parts": [ { "id": "lc-places", "title": "Key Places", "order": 0, "itemIds": [ "concept-mount-everest", "concept-k2", "concept-aconcagua", "concept-denali", "concept-mount-kilimanjaro", "concept-mont-blanc", "mcq-rw-lc-places", "ot-tallest-mtn-1", "ot-tallest-mtn-2", "ot-tallest-mtn-3", "ot-tallest-mtn-4", "ot-tallest-mtn-5", "ot-continental-1", "ot-continental-2", "ot-continental-3", "ot-continental-4", "fact-everest-and-k2-different-ranges", "fact-continental-high-points", "fact-mont-blanc-highest-in-the-alps", "fi-mcq-rw-lc-places", "fi-ot-tallest-mtn-4" ] }, { "id": "lc-things", "title": "Key Things", "order": 1, "itemIds": [ "concept-burj-khalifa", "concept-shanghai-tower", "concept-one-world-trade-center", "concept-cn-tower", "concept-empire-state-building", "concept-eiffel-tower", "mcq-rw-lc-things", "ot-supertall-1", "ot-supertall-2", "ot-supertall-3", "ot-supertall-4", "ot-supertall-5", "ot-iconic-1", "ot-iconic-2", "ot-iconic-3", "ot-iconic-4", "fact-burj-khalifa-and-shanghai-tower", "fact-one-world-trade-center-1776-feet", "fact-eiffel-and-empire-state-reigns", "fi-mcq-rw-lc-things", "fi-ot-supertall-5" ] } ], "studyGuidePath": "/packs/world-numbers/guides/l-key-concepts.md", "objectives": [ { "id": "obj-identify-tallest-mountains", "statement": "Identify the world's highest mountains from their descriptions", "demonstrationIds": [ "d-world-peaks" ] }, { "id": "obj-identify-continental-peaks", "statement": "Identify each continent's highest peak, including Africa's Kilimanjaro", "demonstrationIds": [ "d-continental" ] }, { "id": "obj-identify-supertalls", "statement": "Identify the world's tallest buildings from their descriptions", "demonstrationIds": [ "d-supertalls" ] }, { "id": "obj-identify-iconic-towers", "statement": "Identify iconic towers and the structure once tallest among free-standing buildings", "demonstrationIds": [ "d-iconic" ] } ], "demonstrations": [ { "id": "d-world-peaks", "label": "Highest world peaks", "itemIds": [ "concept-mount-everest", "concept-k2", "concept-aconcagua" ] }, { "id": "d-continental", "label": "Continental peaks", "itemIds": [ "concept-denali", "concept-mount-kilimanjaro", "concept-mont-blanc", "mcq-rw-lc-places" ], "requiredCorrect": 3 }, { "id": "d-supertalls", "label": "Tallest buildings", "itemIds": [ "concept-burj-khalifa", "concept-shanghai-tower", "concept-one-world-trade-center" ] }, { "id": "d-iconic", "label": "Iconic towers", "itemIds": [ "concept-cn-tower", "concept-empire-state-building", "concept-eiffel-tower", "mcq-rw-lc-things" ], "requiredCorrect": 3 } ], "objectiveTests": [ { "id": "test-tallest-mountains", "objectiveId": "obj-identify-tallest-mountains", "title": "World's Highest Mountains", "mcqIds": [ "ot-tallest-mtn-1", "ot-tallest-mtn-2", "ot-tallest-mtn-3", "ot-tallest-mtn-4", "ot-tallest-mtn-5" ] }, { "id": "test-continental-peaks", "objectiveId": "obj-identify-continental-peaks", "title": "Continental High Points", "mcqIds": [ "mcq-rw-lc-places", "ot-continental-1", "ot-continental-2", "ot-continental-3", "ot-continental-4" ] }, { "id": "test-supertalls", "objectiveId": "obj-identify-supertalls", "title": "World's Tallest Buildings", "mcqIds": [ "ot-supertall-1", "ot-supertall-2", "ot-supertall-3", "ot-supertall-4", "ot-supertall-5" ] }, { "id": "test-iconic-towers", "objectiveId": "obj-identify-iconic-towers", "title": "Iconic Towers", "mcqIds": [ "mcq-rw-lc-things", "ot-iconic-1", "ot-iconic-2", "ot-iconic-3", "ot-iconic-4" ] } ] } ] }