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Guess, then see
How many people have no electricity at home? When will the world have the most people? Make a guess, then see the answer drawn, and the page it comes from.
Verified 2026-09-30 · 73 canaries
Every question, with its answer
For reading instead of playing. Each answer stays hidden until you open it.
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Everyone alive
How many people were alive in the middle of 2023? (About 6.1 billion · About 8.1 billion · About 10.1 billion)
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8,091,734,930 people, the UN estimates: about 8.09 billion. The world →
Which country had more people in 2023? (China · India)
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India, by 15,484,664 people. By the middle of 2022, India already had more people than China, in the UN's count. China and India →
In which year will the world have the most people, if the UN is right?
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Around the start of 2084, at about 10.29 billion: the UN's middle path. It is 95% sure the number then lies between 9.51 billion and 11.11 billion, and the top of that range is still rising in 2100. The world →
The world's people aged 15 to 64 are still growing in number. In which year will there be the most of them?
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2070, in the UN's projection. Then their number falls for the first time. The UN gives no range for this figure. Work →
In which year did China have the most people aged 15 to 64?
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2015: about a billion people aged 15 to 64, more than China had in any other year, and more than the UN expects it ever to have again. Work →
Of the 236 countries and areas the UN counts, how many have already had their most people aged 15 to 64?
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74 of 236: their most people aged 15 to 64 came in 2023 or earlier. 55 are still growing in 2100. Work →
Line up everyone in Niger from youngest to oldest. How old is the person in the middle?
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16.3 years (2023): half of Niger's people are younger than that. Most are children. Niger →
Now Japan. How old is the person in the middle?
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50.0 years (2023): half of Japan's people are older than that, more than three times Niger's middle age. Japan →
Of every 1,000 people alive in 2024, how many lived in a country they were not born in?
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37 of every 1,000, fewer than most people guess. The other 963 live in the country they were born in. Migration →
Which country has the most people who were born in another country? (Germany · United Kingdom · United States · Saudi Arabia)
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The United States: 52.4 million people born somewhere else (2024). Migration →
How people live
Of every 100 people on Earth in 2025, how many lived in a city?
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45 of every 100. 36 lived in towns and suburbs and 19 in the countryside, so the world is not yet mostly city. Living →
Of every 100 people in 2024, how many had no electricity at home?
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8 of every 100: 658,997,666 people. Living →
Of every 100 people in 2024, how many did not use the internet?
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29 of every 100: 2,350,648,101 people. Living →
Of every 100 people in 2023, how many did not get enough to eat?
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9 of every 100: 687,797,469 people. Living →
The number of people living in the countryside is still growing. In which year will it be largest?
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2046, in the UN's projection, at 1.65 billion people. The UN gives no range for it. Living →
About how many cities were there in the world in 2025? (About 1,200 · About 12,000 · About 120,000)
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12,138 cities, counted the same way everywhere by the UN: at least 50,000 people living close together. Cities →
Of every 100 cities, how many have fewer than a million people?
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96 of every 100. Most cities are small; the giant ones are few. Cities →
Which city had the most people in 2025? (Tokyo · Jakarta · New Delhi · Dhaka)
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Jakarta: 41,913,860 people, counted the way the UN counts every city. Cities →
Of every 100 people forced from their home (2025), how many are still inside their own country?
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59 of every 100 never crossed a border. The other 41 left their country. Displacement →
In how many of the 236 countries do women live longer than men, on average?
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All 236. Across the world a baby girl can expect to live 75.9 years and a baby boy 70.5 (2023). Health →
The planet and what comes next
Of every 100 people alive in 2025, how many have never lived through a year cooler than the world's 1951–1980 average?
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72 of every 100: everyone born in 1977 or later. Most people alive are young, and every year since has been warmer. Climate →
What was the last year the world was cooler than its 1951–1980 average?
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1976. Every year since has been warmer than that average. Climate →
Which was the warmest year ever measured, up to 2025?
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2024: 1.28 °C above the 1951–1980 average. The record begins in 1880. Climate →
How much carbon dioxide was in the air in 2025, in parts per million? (315.98 · 354.45 · 427.35)
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427.35 parts per million. When measuring began in 1959, it was 315.98. Climate →
Of every 100 units of electricity made in 2024, how many came from nuclear, water, wind, the sun and plants?
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41 of every 100 (40.9). The rest came from burning coal, gas or oil. Energy →
How much electricity did the world use for each person alive in 2024? (379 kWh · 3,787 kWh · 37,870 kWh)
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3,787 kilowatt-hours a person. But the half of the world that uses least used only 12 of every 100 units. Energy →
Everything the world makes in a year: how many times bigger was it in 2024 than in 1960? (×2.7 · ×8.7 · ×30)
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8.7 times. Part of that is more people (×2.7); the rest is each person making more (×3.2). Economy →
How many notable AI models were released in 2025?
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107, counted by Epoch AI, which lists every AI model it judges notable. Ten years earlier, in 2015, it lists 29. Thinking machines →
How many people will be alive in 2100, if the UN is right? (About 8 billion · About 10 billion · About 15 billion)
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About 10.17 billion: the UN's middle path. It is 95% sure the number will be between 9.02 billion and 11.44 billion. The world by its people →
Africa had about 228 million people in 1950. About how many will it have in 2100, if the UN is right? (About 900 million · About 3.8 billion · About 9 billion)
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About 3.81 billion (3,813,883,603), 17 times as many. The UN gives no range for a continent. The world by its people →
What this cannot tell you
- Anything new. Every answer is a figure another page of this site prints, in the same words, and each answer links to it. A build check fails if a page and the game ever disagree.
- The future for certain. Answers after 2023 are the UN’s medium projection: its most likely path. Where the UN gives a range it is said; where it gives none, the answer says so.
- Your score, anywhere else. Your best score for each round is kept on this device only, in your browser’s storage, and never sent. Clearing your browser’s site data removes it.
Sources and method
Every answer is read, when the site is built, from the file its own page prints: the UN's population, city and migrant figures, UNHCR, the World Bank, Ember, NASA and NOAA, Epoch AI. A check fails the build if a page and the game ever say different things. Stars: for “of every 100” questions, within 3 of the answer is three stars, within 8 two, within 15 one (scaled for 236 and 1,000); years within 2, 7 and 15; ages within 2, 5 and 10.