The question bank
Every question below is a little game: guess first, then see the verified answer and its source. For the real thing — five fresh questions a day, scored — play today's puzzle.
Animals & Nature
- How fast can an ostrich run at top speed in a sprint, in km/h? (1 km/h ≈ 0.6 mph)Guess →
- How much does an average ostrich egg weigh, in kg? (1 kg ≈ 2.2 lb)Guess →
- How tall can an adult male giraffe grow, from the ground to the top of its head, in meters?Guess →
- How many hours per day does a koala typically sleep?Guess →
- How many hearts does an octopus have?Guess →
- How many days is an African elephant pregnant before giving birth?Guess →
- The longest monarch butterfly fall migration route, from southern Canada to central Mexico, covers how many km one-way? (1 km ≈ 0.6 mi)Guess →
- How tall is Hyperion, the coast redwood in California that is the world's tallest known living tree, in meters, per its most recent (2019) published measurement?Guess →
- What is the largest wingspan ever verified on a wandering albatross, in meters?Guess →
- What is the fastest running speed reliably recorded for a cheetah (set by Sarah at the Cincinnati Zoo in 2012), in km/h? (1 km/h ≈ 0.6 mph)Guess →
- What is the fastest dive speed ever recorded for a peregrine falcon, in km/h? (1 km/h ≈ 0.6 mph)Guess →
- How much did the real blue whale heart preserved by the Royal Ontario Museum weigh, in kg? (1 kg ≈ 2.2 lb)Guess →
- How many years old was the oldest Greenland shark, as estimated by the landmark 2016 radiocarbon-dating study?Guess →
- How many years old is Methuselah, the ancient bristlecone pine in California that is the oldest known living non-clonal tree, as of 2024?Guess →
- About how many eggs does a healthy honeybee queen lay per day at the peak of the season?Guess →
- The all-time record at the World Snail Racing Championships was set in 1995 by a snail named Archie covering the official 33 cm (13 in) course — how many seconds did it take?Guess →
- What is the deepest dive ever recorded for an emperor penguin, in meters?Guess →
- How many eggs does a green sea turtle lay in a single nest, on average?Guess →
- How many kg of vegetation can an adult African elephant eat in a single day? (1 kg ≈ 2.2 lb)Guess →
- On average, how many liters of water does a lactating dairy cow drink per day? (1 liter ≈ 0.26 US gallons)Guess →
- Roughly how many wildebeest take part in the Serengeti's Great Migration each year?Guess →
- How many tigers were living in the wild worldwide as of the 2023 global estimate?Guess →
- How many km does an Arctic tern fly on its average annual round-trip migration between the Arctic and Antarctica? (1 km ≈ 0.6 mi)Guess →
- According to a 2022 global estimate, how many ants are there for every one human on Earth?Guess →
- How many legs does the leggiest millipede species ever discovered (Eumillipes persephone, found in Australia in 2021) have?Guess →
- How many times per minute does a blue whale's heart beat at its slowest, recorded during deep feeding dives?Guess →
- According to the landmark 2013 scientific estimate, how many individual trees grow in the Amazon rainforest?Guess →
- A desert locust swarm covering one square km eats the same amount of food in a day as how many people?Guess →
- How many neck vertebrae does a giraffe have?Guess →
Food & Drink
- How many calories are in a McDonald's Big Mac, according to McDonald's US nutrition data as of 2026?Guess →
- How many grams of sugar are in a 12-ounce (355 ml) can of regular Coca-Cola sold in the US?Guess →
- What percent of a watermelon's weight is water?Guess →
- How many hot dogs (with buns) did Joey Chestnut eat in 10 minutes to set the all-time Nathan's Hot Dog Eating Contest record in 2021?Guess →
- How many calories are in one tablespoon of olive oil?Guess →
- How many eggs does a modern commercial laying hen produce in her first year of laying?Guess →
- How many months, at minimum, must Parmigiano-Reggiano cheese be aged before it can legally carry the name?Guess →
- How many seeds are on the outside of an average strawberry?Guess →
- How many liters of milk does the average US dairy cow produce per day (2023 average)?Guess →
- How many kilograms of chocolate does the average Swiss resident eat per year, as of 2024 (1 kg ≈ 2.2 lb)?Guess →
- How many McDonald's restaurants were there worldwide as of the end of 2024?Guess →
- How many kernels are on an average ear of corn?Guess →
- How many peanuts does it take to make one 12-ounce (340 g) jar of peanut butter?Guess →
- How many distinct varieties of apple are grown around the world?Guess →
- How many kilograms of grapes does it take to make one standard 750 ml bottle of wine (1 kg ≈ 2.2 lb)?Guess →
- About what percent of the world's cocoa beans are grown in Côte d'Ivoire, the top-producing country?Guess →
- How many kilograms of pasta does the average Italian eat per year (1 kg ≈ 2.2 lb)?Guess →
- For how many years had Sobrino de Botín in Madrid, the world's oldest continuously operating restaurant, been serving customers as of 2025?Guess →
- How many cups of tea are drunk in the UK each day?Guess →
- How many meters long was the longest pizza ever made, set in Fontana, California in 2017 (1 km ≈ 0.6 mi)?Guess →
- How many kilograms did the heaviest pumpkin ever grown weigh, a world record set in the UK in 2025 (1 kg ≈ 2.2 lb)?Guess →
- About what percent of the world's garlic is grown in China?Guess →
- According to the UN FAO, what percent of all food produced for human consumption worldwide is lost or wasted?Guess →
- How many liters of water does it take to produce 1 kg of beef on a global average, counting all water used to grow the animal's feed?Guess →
- How many individual flowers must honeybees visit to gather enough nectar for 1 kg of honey?Guess →
- About how many crocus flowers must be hand-picked to produce 1 kg of saffron, the world's most expensive spice?Guess →
- How many servings of instant noodles were eaten worldwide in 2023?Guess →
- How many Big Macs had world-record holder Don Gorske eaten in his lifetime as of March 2025?Guess →
- How many US dollars did the record-setting bluefin tuna sell for at Tokyo's New Year fish auction in 2019?Guess →
- How many bubbles are released in a single 100 ml glass of champagne as it goes flat?Guess →
- How many years old is the Speyer wine bottle, the world's oldest known unopened bottle of wine, as of 2025?Guess →
Geography & Planet Earth
- How many meters above sea level is the summit of Mount Everest?Guess →
- How many people were alive on Earth in mid-2024?Guess →
- What percent of Earth's surface is covered by ocean?Guess →
- How many member states did the United Nations have as of 2024?Guess →
- How many UN member states are located in Africa as of 2024?Guess →
- How long is the Nile River, conventionally measured from its remotest headstream to the Mediterranean, in km (1 km ≈ 0.6 mi)?Guess →
- How old is planet Earth, in years?Guess →
- How long is Earth's equator, in km (1 km ≈ 0.6 mi)?Guess →
- What was the population of India as of 2024?Guess →
- How many meters below sea level is Challenger Deep, the deepest point in the ocean?Guess →
- What is the approximate area of the Sahara Desert in square kilometers (1 km² ≈ 0.39 sq mi)?Guess →
- How many meters deep is Lake Baikal at its deepest point?Guess →
- What is the surface area of the Caspian Sea, the world's largest lake, in square kilometers?Guess →
- How many meters below sea level was the surface of the Dead Sea as of 2024?Guess →
- What is the total height of Angel Falls in Venezuela, the world's tallest waterfall, in meters?Guess →
- How many countries share a land border with China?Guess →
- How many of the world's widely recognized sovereign countries are landlocked, with no coastline at all, as of 2024?Guess →
- How many countries does the Danube River flow through or along?Guess →
- How many km long is Australia's Great Barrier Reef, measured along its length?Guess →
- What is the average depth of the world's oceans, in meters?Guess →
- What percent of all the water on Earth is fresh water?Guess →
- How many islands does Sweden have, according to Statistics Sweden's official inventory, which counts every patch of land surrounded by water down to just 9 square meters?Guess →
- How many liters of water does the Amazon River pour into the Atlantic Ocean every second, averaged over a year?Guess →
- How many meters deep is the Kola Superdeep Borehole in Russia, the deepest hole humans have ever drilled?Guess →
- How fast, in km/h, does a point on Earth's equator move because of the planet's rotation (1 km/h ≈ 0.62 mph)?Guess →
- How many lightning flashes occur worldwide on an average day — in-cloud and cloud-to-ground combined — according to NASA satellite measurements?Guess →
- How many tonnes of Saharan dust does the wind carry west off the coast of Africa in an average year?Guess →
- How many km from the nearest land is Point Nemo, the most remote spot in the world's oceans?Guess →
History & Civilizations
- How many years did the Berlin Wall stand, from its construction in 1961 to its fall in 1989?Guess →
- How many years did the Hundred Years' War between England and France actually last?Guess →
- How tall, in meters, was the Great Pyramid of Giza when it was completed (original height, including its now-lost capstone)?Guess →
- How many spectators could Rome's Colosseum seat, according to the standard modern scholarly estimate?Guess →
- How many delegates signed the United States Declaration of Independence?Guess →
- How many soldiers made up a single Roman legion at full strength during the early Empire?Guess →
- How many years did it take to build the Great Pyramid of Giza, according to the consensus of Egyptologists?Guess →
- How many years did it take to complete the entire Taj Mahal complex, including its mosque, gateway, and gardens?Guess →
- How old, in years as of 2024, is Stonehenge's iconic sarsen stone circle?Guess →
- How many people died in the sinking of the Titanic in 1912, per the official British inquiry?Guess →
- How many years did the Ottoman Empire last, from its founding around 1299 to its dissolution in 1922?Guess →
- How many years did the Byzantine Empire endure, from the dedication of Constantinople in 330 AD to the city's fall in 1453?Guess →
- How many soldier figures are estimated to be buried in the Terracotta Army guarding China's first emperor?Guess →
- How many ancient pyramids have been catalogued in Egypt, per the most commonly cited count?Guess →
- How old, in years as of 2024, is Ötzi the Iceman, the mummified man found frozen in the Alps in 1991?Guess →
- How many moai statues have been documented on Easter Island, per the Easter Island Statue Project's inventory?Guess →
- How many square kilometers did the Mongol Empire cover at its peak, making it history's largest contiguous land empire?Guess →
- As of 2024, how many years has Barcelona's Sagrada Família basilica been under construction?Guess →
- How many years did the Viking Age last, from the raid on Lindisfarne in 793 to the Battle of Stamford Bridge in 1066?Guess →
- How many minutes did the Anglo-Zanzibar War of 1896, the shortest war in recorded history, last?Guess →
- How many people lived in the city of ancient Rome at its peak in the 2nd century AD?Guess →
- How many years did it take to complete Cologne Cathedral, from its groundbreaking in 1248 to its finish in 1880?Guess →
- How many kilometers long is the Great Wall of China, counting all sections and branches ever built, per China's official 2012 survey (1 km ≈ 0.6 mi)?Guess →
- How many men alive today carry the Y-chromosome lineage attributed to Genghis Khan, per the landmark 2003 genetics study?Guess →
- How many months did the legendary Pony Express mail service actually operate?Guess →
- How many years did the Aztec Empire last, from the founding of the Triple Alliance in 1428 to the fall of Tenochtitlan in 1521?Guess →
- How many stone blocks make up the Great Pyramid of Giza, per the standard Egyptological estimate?Guess →
- How many years passed between the completion of the Great Pyramid of Giza and the birth of Cleopatra?Guess →
Space & the Universe
- How many people have walked on the surface of the Moon?Guess →
- On average, how many minutes does light from the Sun take to reach Earth?Guess →
- At what average altitude in kilometers does the International Space Station orbit Earth (1 km ≈ 0.6 mi)?Guess →
- How many kilometers above sea level is the Kármán line, the most widely used official boundary of space?Guess →
- How many years old is the universe?Guess →
- What is the average distance from Earth to the Sun in kilometers (1 km ≈ 0.6 mi)?Guess →
- How many times does the International Space Station orbit Earth in one day?Guess →
- As of 2024, how many countries have launched humans into orbit using their own rockets?Guess →
- How many years does Halley's Comet take to complete one orbit of the Sun?Guess →
- How many days did the Apollo 11 mission last, from launch to splashdown?Guess →
- What is the average distance from Earth to the Moon in kilometers (1 km ≈ 0.6 mi)?Guess →
- How fast does the International Space Station travel in its orbit, in kilometers per hour (1 km ≈ 0.6 mi)?Guess →
- How many Earth days does Venus take to rotate once on its axis?Guess →
- How many days did the longest single human spaceflight last, set by cosmonaut Valeri Polyakov aboard the Mir station?Guess →
- How many missions did NASA's Space Shuttle fleet fly over its entire 30-year program?Guess →
- How tall in meters was the Saturn V rocket that launched astronauts to the Moon?Guess →
- How many kilograms of Moon rock and soil did the six Apollo landing missions bring back to Earth in total?Guess →
- How many minutes did Yuri Gagarin's 1961 flight, the first human spaceflight in history, last from launch to landing?Guess →
- How many Earths could fit inside the Sun by volume?Guess →
- How many kilometers does Olympus Mons on Mars, the tallest volcano in the solar system, rise above the surrounding plains?Guess →
- As of mid-2024, how many kilometers was Voyager 1, the most distant human-made object, from Earth?Guess →
- What top speed in kilometers per hour did NASA's Parker Solar Probe reach during its record-setting close pass of the Sun in December 2024?Guess →
- Driving flat-out at its top speed, how many meters can NASA's Perseverance Mars rover cover in one hour?Guess →
- How many metric tonnes of meteoritic material (space dust and rock) fall into Earth's atmosphere on an average day, per NASA's estimate?Guess →
- How many years does the Sun take to complete one orbit around the center of the Milky Way?Guess →
- How many years does light take to travel from one edge of the Milky Way's disk to the other?Guess →
- How many Earth days pass on Mercury from one sunrise to the next?Guess →
Sports, Music & Entertainment
- How many kilometers long is an official marathon course? (1 km ≈ 0.6 mi)Guess →
- How many regular-season games does each NBA team play?Guess →
- How many regular-season games does each Major League Baseball team play?Guess →
- How many Olympic medals did swimmer Michael Phelps win in his career?Guess →
- How many US dollars had Avatar (2009) grossed at the worldwide box office as of 2025, including re-releases?Guess →
- How many Grammy Awards had Beyoncé won as of the end of 2024?Guess →
- As of the end of 2024, what was the world-record time in seconds for a single 3x3 Rubik's Cube solve?Guess →
- How many official Eon-produced James Bond films had been released as of 2024?Guess →
- How many letter tiles come in a standard English Scrabble set, including blanks?Guess →
- How many kilometers did riders cover over the full route of the 2024 Tour de France? (1 km ≈ 0.6 mi)Guess →
- How many career regular-season points (goals plus assists) did Wayne Gretzky score in the NHL?Guess →
- How many strings are on a full-size concert pedal harp?Guess →
- How many minutes of playing time did the longest professional tennis match — Isner vs. Mahut at Wimbledon 2010 — last?Guess →
- What peak speed in km/h did Usain Bolt reach during his 2009 100 m world record? (50 km/h ≈ 31 mph)Guess →
- How many dimples does a Titleist Pro V1 golf ball (2023–24 model) have?Guess →
- How many double stitches hold the cover of an official Major League baseball together?Guess →
- How many goals did Lionel Messi score for club and country in 2012, the record for a single calendar year?Guess →
- How many distinct Pokémon species were in the official National Pokédex as of 2024?Guess →
- How many episodes of The Simpsons had aired by the end of season 35 in May 2024?Guess →
- How many US dollars are in the bank of a standard US Monopoly set (2008 and later editions)?Guess →
- How many grams of actual gold are in a Paris 2024 Olympic gold medal?Guess →
- How many years old are the oldest known musical instruments, bone and ivory flutes found in caves in southern Germany?Guess →
- How many pipes does the world's largest pipe organ, in Atlantic City's Boardwalk Hall, have?Guess →
- How many tennis balls are used during the Wimbledon Championships each year?Guess →
- How many performances did The Phantom of the Opera give on Broadway before closing in 2023?Guess →
- According to the IOC, how many athletes competed at the first modern Olympic Games in Athens in 1896?Guess →
- How many liters of water fill an Olympic-size swimming pool built at the minimum legal depth of 2 meters?Guess →
Technology, Internet & Money
- How many people worldwide were using the internet as of 2024?Guess →
- How many monthly active users did Facebook report as of the end of 2023, the last time it disclosed the figure?Guess →
- What was the announced price, in US dollars, when Facebook agreed to buy Instagram in 2012?Guess →
- What was the US launch price of the original 4GB iPhone in 2007, in US dollars (with a two-year contract)?Guess →
- How many years old was Apple, the company, at the end of 2025?Guess →
- What is the maximum number of bitcoins that can ever exist under Bitcoin's protocol rules?Guess →
- How many paid subscribers did Netflix have worldwide at the end of 2024?Guess →
- How many articles did the English-language Wikipedia have at the start of 2025?Guess →
- What was the standard price Fox charged for a 30-second TV ad during the February 2025 Super Bowl, in US dollars?Guess →
- What percent of the world's population used the internet as of 2024?Guess →
- How many searches does Google handle per day, based on figures Google shared in 2025?Guess →
- How many hours of video get uploaded to YouTube every minute, per the last per-minute figure YouTube disclosed?Guess →
- How many active satellites were orbiting Earth at the end of 2024, per astronomer Jonathan McDowell's satellite catalog?Guess →
- How many years old was Nintendo, the company, at the end of 2025?Guess →
- How many bitcoins did programmer Laszlo Hanyecz pay for two pizzas in the famous 2010 'Bitcoin Pizza Day' transaction?Guess →
- How much did the domain name Voice.com sell for in 2019, in US dollars — at the time the highest publicly confirmed price ever paid for a domain name?Guess →
- How much did Beeple's digital artwork 'Everydays: The First 5000 Days' sell for as an NFT at Christie's in March 2021, in US dollars?Guess →
- What was the US retail price of the Motorola DynaTAC 8000X, the first commercial handheld mobile phone, at its 1984 launch, in US dollars?Guess →
- How many tonnes of electronic waste did the world generate in 2022 (1 tonne = 1,000 kg)?Guess →
- How many active mobile-cellular phone subscriptions existed worldwide as of 2024?Guess →
- How much revenue did the global video game industry generate in 2024, in US dollars?Guess →
- How many copies of Minecraft had been sold as of Mojang's October 2023 milestone announcement?Guess →
- The IBM 305 RAMAC of 1956 was the first computer with a hard drive — how much did one cost to lease per month, in US dollars?Guess →
- How many kilobytes of RAM did the Apollo 11 guidance computer have when it landed humans on the Moon?Guess →
- How many tonnes did ENIAC, the first general-purpose electronic computer, weigh when it was unveiled in 1946 (1 tonne = 1,000 kg)?Guess →
- How many kilometers of submarine fiber-optic cable are in service across the world's ocean floors as of early 2026 (1 km ≈ 0.6 mi)?Guess →
- How many transistors were on the Intel 4004, the first commercial microprocessor, released in 1971?Guess →
- How many emails are sent and received worldwide per day as of 2024?Guess →
- How many lines of code did Google's main source-code repository contain, per the figure Google disclosed in 2015?Guess →
- What was the total value of US paper currency (Federal Reserve notes) in circulation at the end of 2024, in US dollars?Guess →
The Human Body
- How many bones are in the typical adult human skeleton?Guess →
- How many teeth are in a complete adult set, including all four wisdom teeth?Guess →
- What is a typical resting heart rate for a healthy adult, in beats per minute?Guess →
- How many liters of blood are circulating in the average adult's body?Guess →
- What percent of the average adult male's body weight is water?Guess →
- How many ribs does the typical adult have, counting both sides?Guess →
- How many individual hairs are on the average adult human scalp?Guess →
- How many times does the average adult's heart beat in one day?Guess →
- Up to how many scalp hairs a day is it normal for a healthy adult to shed?Guess →
- Blood makes up roughly what percent of the average adult's total body weight?Guess →
- How many bones does a newborn baby have at birth?Guess →
- Roughly how many skeletal muscles are in the human body?Guess →
- Roughly how many meters long is the average adult's small intestine when fully uncoiled? (1 m ≈ 3.3 ft)Guess →
- How many kilograms does the average adult's skin weigh, excluding the fat layer beneath it? (1 kg ≈ 2.2 lb)Guess →
- How many times does the average adult blink during one waking day?Guess →
- How many breaths does the average adult take in one day?Guess →
- How many bones are in one adult human hand, from wrist to fingertips?Guess →
- If you sleep 8 hours a night, how many years in total will you spend asleep over a 78-year lifespan?Guess →
- Roughly how many protein-coding genes are in the human genome?Guess →
- How many days does a typical red blood cell survive in the average adult's bloodstream?Guess →
- How many neurons are in the average adult human brain?Guess →
- According to the widely cited 2013 scientific estimate, how many human cells make up the average adult body?Guess →
- How many liters of blood does the average adult heart pump in one day?Guess →
- How many new red blood cells does the average adult's bone marrow produce every second?Guess →
- How many alveoli — the tiny air sacs where oxygen enters the blood — are in an average pair of adult human lungs?Guess →
- If you uncoiled the DNA packed inside a single human cell, how many meters long would it be?Guess →
- How fast do the fastest nerve signals travel along the human body's most heavily insulated nerve fibers, in km/h? (100 km/h ≈ 62 mph)Guess →