| Group | Answer | Population | % Correct |
|---|---|---|---|
| 1900 | Brazil | 17M | 100%
|
| 1910 | Brazil | 22M | 100%
|
| 1920 | Brazil | 27M | 100%
|
| 1930 | Brazil | 33M | 100%
|
| 1940 | Brazil | 41M | 100%
|
| 1950 | Brazil | 52M | 100%
|
| 1960 | Brazil | 71M | 100%
|
| 1970 | Brazil | 94M | 100%
|
| 1980 | Brazil | 119M | 100%
|
| 1990 | Brazil | 147M | 100%
|
| 2000 | Brazil | 172M | 100%
|
| 2010 | Brazil | 192M | 100%
|
| 2020 | Brazil | 208M | 100%
|
| Present | Brazil | 212M | 100%
|
| 1900 | China | 399M | 100%
|
| 1910 | China | 424M | 100%
|
| 1920 | China | 468M | 100%
|
| 1930 | China | 489M | 100%
|
| 1940 | China | 519M | 100%
|
| 1950 | China | 541M | 100%
|
| 1960 | China | 658M | 100%
|
| 1970 | China | 816M | 100%
|
| 1980 | China | 981M | 100%
|
| 1990 | China | 1,149M | 100%
|
| 2000 | China | 1,271M | 100%
|
| 2010 | China | 1,354M | 100%
|
| 2020 | China | 1,433M | 100%
|
| Present | China | 1,424M | 100%
|
| 1900 | India | 242M | 100%
|
| 1910 | India | 253M | 100%
|
| 1920 | India | 266M | 100%
|
| 1930 | India | 284M | 100%
|
| 1940 | India | 323M | 100%
|
| 1950 | India | 342M | 100%
|
| 1960 | India | 430M | 100%
|
| 1970 | India | 539M | 100%
|
| 1980 | India | 679M | 100%
|
| 1990 | India | 855M | 100%
|
| 2000 | India | 1,048M | 100%
|
| 2010 | India | 1,234M | 100%
|
| 2020 | India | 1,395M | 100%
|
| Present | India | 1,461M | 100%
|
| 1900 | United Kingdom | 37M | 100%
|
| 1910 | United Kingdom | 41M | 100%
|
| 1920 | United Kingdom | 43M | 100%
|
| 1930 | United Kingdom | 45M | 100%
|
| 1940 | United Kingdom | 48M | 100%
|
| 1950 | United Kingdom | 50M | 100%
|
| 1960 | United Kingdom | 52M | 100%
|
| 1970 | United Kingdom | 55M | 100%
|
| 1980 | United kingdom | 56M | 100%
|
| 1990 | United Kingdom | 57M | 100%
|
| 1900 | Bangladesh | 29M | 98%
|
| 1910 | Bangladesh | 30M | 98%
|
| 1920 | Bangladesh | 32M | 98%
|
| 1930 | Bangladesh | 34M | 98%
|
| 1940 | Bangladesh | 37M | 98%
|
| 1950 | Bangladesh | 40M | 98%
|
| 1960 | Bangladesh | 51M | 98%
|
| 1970 | Bangladesh | 68M | 98%
|
| 1980 | Bangladesh | 86M | 98%
|
| 1990 | Bangladesh | 110M | 98%
|
| 2000 | Bangladesh | 133M | 98%
|
| 2010 | Bangladesh | 151M | 98%
|
| 2020 | Bangladesh | 165M | 98%
|
| Present | Bangladesh | 175M | 98%
|
| 1900 | France | 40M | 98%
|
| 1910 | France | 41M | 98%
|
| 1920 | France | 38M | 98%
|
| 1930 | France | 41M | 98%
|
| 1940 | France | 41M | 98%
|
| 1950 | France | 42M | 98%
|
| 1960 | France | 47M | 98%
|
| 1970 | France | 51M | 98%
|
| 1980 | France | 55M | 98%
|
| 1990 | France | 58M | 98%
|
| 2000 | France | 61M | 98%
|
| 1900 | Germany | 55M | 98%
|
| 1910 | Germany | 64M | 98%
|
| 1920 | Germany | 63M | 98%
|
| 1930 | Germany | 66M | 98%
|
| 1940 | Germany | 71M | 98%
|
| 1950 | Germany | 69M | 98%
|
| 1960 | Germany | 72M | 98%
|
| 1970 | Germany | 78M | 98%
|
| 1980 | Germany | 78M | 98%
|
| 1990 | Germany | 78M | 98%
|
| 2000 | Germany | 81M | 98%
|
| 2010 | Germany | 80M | 98%
|
| 2020 | Germany | 83M | 98%
|
| Present | Germany | 84M | 98%
|
| 1900 | Indonesia | 37M | 98%
|
| 1910 | Indonesia | 42M | 98%
|
| 1920 | Indonesia | 46M | 98%
|
| 1930 | Indonesia | 53M | 98%
|
| 1940 | Indonesia | 61M | 98%
|
| 1950 | Indonesia | 68M | 98%
|
| 1960 | Indonesia | 87M | 98%
|
| 1970 | Indonesia | 114M | 98%
|
| 1980 | Indonesia | 147M | 98%
|
| 1990 | Indonesia | 181M | 98%
|
| 2000 | Indonesia | 214M | 98%
|
| 2010 | Indonesia | 244M | 98%
|
| 2020 | Indonesia | 273M | 98%
|
| Present | Indonesia | 285M | 98%
|
| 1900 | Japan | 44M | 98%
|
| 1910 | Japan | 49M | 98%
|
| 1920 | Japan | 55M | 98%
|
| 1930 | Japan | 64M | 98%
|
| 1940 | Japan | 73M | 98%
|
| 1950 | Japan | 85M | 98%
|
| 1960 | Japan | 96M | 98%
|
| 1970 | Japan | 106M | 98%
|
| 1980 | Japan | 117M | 98%
|
| 1990 | Japan | 123M | 98%
|
| 2000 | Japan | 126M | 98%
|
| 2010 | Japan | 128M | 98%
|
| 2020 | Japan | 126M | 98%
|
| Present | Japan | 123M | 98%
|
| 1900 | Mexico | 13M | 98%
|
| 1910 | Mexico | 15M | 98%
|
| 1920 | Mexico | 15M | 98%
|
| 1930 | Mexico | 17M | 98%
|
| 1940 | Mexico | 20M | 98%
|
| 1950 | Mexico | 27M | 98%
|
| 1960 | Mexico | 36M | 98%
|
| 1970 | Mexico | 50M | 98%
|
| 1980 | Mexico | 66M | 98%
|
| 1990 | Mexico | 82M | 98%
|
| 2000 | Mexico | 97M | 98%
|
| 2010 | Mexico | 112M | 98%
|
| 2020 | Mexico | 126M | 98%
|
| Present | Mexico | 131M | 98%
|
| 1900 | Pakistan | 18M | 98%
|
| 1910 | Pakistan | 19M | 98%
|
| 1920 | Pakistan | 21M | 98%
|
| 1930 | Pakistan | 23M | 98%
|
| 1940 | Pakistan | 27M | 98%
|
| 1950 | Pakistan | 35M | 98%
|
| 1960 | Pakistan | 45M | 98%
|
| 1970 | Pakistan | 59M | 98%
|
| 1980 | Pakistan | 80M | 98%
|
| 1990 | Pakistan | 114M | 98%
|
| 2000 | Pakistan | 152M | 98%
|
| 2010 | Pakistan | 196M | 98%
|
| 2020 | Pakistan | 232M | 98%
|
| Present | Pakistan | 254M | 98%
|
| 1900 | United States | 77M | 98%
|
| 1910 | United States | 94M | 98%
|
| 1920 | United States | 108M | 98%
|
| 1930 | United States | 125M | 98%
|
| 1940 | United States | 135M | 98%
|
| 1950 | United States | 155M | 98%
|
| 1960 | United States | 181M | 98%
|
| 1970 | United States | 209M | 98%
|
| 1980 | United States | 232M | 98%
|
| 1990 | United States | 255M | 98%
|
| 2000 | United States | 284M | 98%
|
| 2010 | United States | 313M | 98%
|
| 2020 | United States | 342M | 98%
|
| Present | United States | 350M | 98%
|
| 1930 | Egypt | 15M | 95%
|
| 1950 | Egypt | 20M | 95%
|
| 1990 | Egypt | 57M | 95%
|
| 2000 | Egypt | 72M | 95%
|
| 2010 | Egypt | 88M | 95%
|
| 2020 | Egypt | 108M | 95%
|
| Present | Egypt | 118M | 95%
|
| 1900 | Italy | 33M | 95%
|
| 1910 | Italy | 36M | 95%
|
| 1920 | Italy | 37M | 95%
|
| 1930 | Italy | 40M | 95%
|
| 1940 | Italy | 44M | 95%
|
| 1950 | Italy | 46M | 95%
|
| 1960 | Italy | 49M | 95%
|
| 1970 | Italy | 53M | 95%
|
| 1980 | Italy | 56M | 95%
|
| 1990 | Italy | 57M | 95%
|
| 1900 | Nigeria | 17M | 95%
|
| 1910 | Nigeria | 17M | 95%
|
| 1920 | Nigeria | 18M | 95%
|
| 1930 | Nigeria | 19M | 95%
|
| 1940 | Nigeria | 26M | 95%
|
| 1950 | Nigeria | 36M | 95%
|
| 1960 | Nigeria | 44M | 95%
|
| 1970 | Nigeria | 55M | 95%
|
| 1980 | Nigeria | 72M | 95%
|
| 1990 | Nigeria | 95M | 95%
|
| 2000 | Nigeria | 124M | 95%
|
| 2010 | Nigeria | 164M | 95%
|
| 2020 | Nigeria | 211M | 95%
|
| Present | Nigeria | 236M | 95%
|
| 1990 | Iran | 57M | 93%
|
| 2000 | Iran | 65M | 93%
|
| 2010 | Iran | 76M | 93%
|
| 2020 | Iran | 87M | 93%
|
| Present | Iran | 92M | 93%
|
| 1900 | Russia | 64M | 93%
|
| 1910 | Russia | 71M | 93%
|
| 1920 | Russia | 77M | 93%
|
| 1930 | Russia | 85M | 93%
|
| 1940 | Russia | 93M | 93%
|
| 1950 | Russia | 102M | 93%
|
| 1960 | Russia | 119M | 93%
|
| 1970 | Russia | 130M | 93%
|
| 1980 | Russia | 136M | 93%
|
| 1990 | Russia | 148M | 93%
|
| 2000 | Russia | 146M | 93%
|
| 2010 | Russia | 143M | 93%
|
| 2020 | Russia | 146M | 93%
|
| Present | Russia | 144M | 93%
|
| 1900 | Spain | 18M | 91%
|
| 1910 | Spain | 19M | 91%
|
| 1920 | Spain | 21M | 91%
|
| 1930 | Spain | 23M | 91%
|
| 1940 | Spain | 25M | 91%
|
| 1950 | Spain | 28M | 91%
|
| 1960 | Spain | 30M | 91%
|
| 1900 | Turkey | 13M | 91%
|
| 1910 | Turkey | 14M | 91%
|
| 1920 | Turkey | 14M | 91%
|
| 1940 | Turkey | 17M | 91%
|
| 1960 | Turkey | 27M | 91%
|
| 1970 | Turkey | 36M | 91%
|
| 1980 | Turkey | 44M | 91%
|
| 1990 | Turkey | 55M | 91%
|
| 2000 | Turkey | 65M | 91%
|
| 2010 | Turkey | 72M | 91%
|
| 2020 | Turkey | 85M | 91%
|
| Present | Turkey | 87M | 91%
|
| 1970 | Philippines | 37M | 89%
|
| 1980 | Philippines | 47M | 89%
|
| 1990 | Philippines | 62M | 89%
|
| 2000 | Philippines | 78M | 89%
|
| 2020 | Philippines | 111M | 89%
|
| Present | Philippines | 116M | 89%
|
| 2010 | Phillippines | 95M | 89%
|
| 2000 | Ethiopia | 66M | 86%
|
| 2010 | Ethiopia | 89M | 86%
|
| 2020 | Ethiopia | 117M | 86%
|
| Present | Ethiopia | 134M | 86%
|
| 1900 | Vietnam | 14M | 86%
|
| 1910 | Vietnam | 16M | 86%
|
| 1920 | Vietnam | 18M | 86%
|
| 1930 | Vietnam | 20M | 86%
|
| 1940 | Vietnam | 22M | 86%
|
| 1950 | Vietnam | 24M | 86%
|
| 1960 | Vietnam | 32M | 86%
|
| 1970 | Vietnam | 41M | 86%
|
| 1980 | Vietnam | 51M | 86%
|
| 1990 | Vietnam | 64M | 86%
|
| 2000 | Vietnam | 76M | 86%
|
| 2010 | Vietnam | 86M | 86%
|
| 2020 | Vietnam | 97M | 86%
|
| Present | Vietnam | 101M | 86%
|
| 1900 | Poland | 24M | 84%
|
| 1910 | Poland | 26M | 84%
|
| 1920 | Poland | 24M | 84%
|
| 1930 | Poland | 28M | 84%
|
| 1940 | Poland | 30M | 84%
|
| 1950 | Poland | 24M | 84%
|
| 1960 | Poland | 29M | 84%
|
| 1970 | Thailand | 35M | 84%
|
| 1980 | Thailand | 45M | 84%
|
| 2000 | Thailand | 62M | 84%
|
| 2010 | Thailand | 68M | 84%
|
| 2020 | Thailand | 71M | 84%
|
| Present | Thailand | 71M | 84%
|
| 2010 | DRC | 67M | 70%
|
| 2020 | DRC | 94M | 70%
|
| Present | DRC | 112M | 70%
|
| 1900 | Ukraine | 23M | 66%
|
| 1910 | Ukraine | 25M | 66%
|
| 1920 | Ukraine | 28M | 66%
|
| 1930 | Ukraine | 30M | 66%
|
| 1940 | Ukraine | 33M | 66%
|
| 1950 | Ukraine | 37M | 66%
|
| 1960 | Ukraine | 42M | 66%
|
| 1970 | Ukraine | 47M | 66%
|
| 1980 | Ukraine | 49M | 66%
|