| Million sq km | Year | Answer | % Correct |
|---|---|---|---|
| 35.5 | 1920 | British Empire | 97%
|
| 24.0 | 1270 or 1309 | Mongol Empire | 80%
|
| 13.7 | 1810 | Spanish Empire | 80%
|
| 22.8 | 1895 | Russian Empire | 77%
|
| 14.7 | 1790 | Qing Dynasty | 30%
|
| 6.5 | 1450 | Ming Dynasty | 27%
|
| 5.5 | 500BC | Achaemenid Empire | 23%
|
| 11.1 | 720 | Umayyad Caliphate | 20%
|
| 11.1 | 750 | Abbasid Caliphate | 17%
|
| 7.4 | 1942 | Empire of Japan | 17%
|
| 11.0 | 1310 | Yuan Dynasty | 17%
|
| 7.1 | 1640 | Iberian Union | 13%
|
| 11.5 | 1920 | Second French Colonial Empire | 13%
|
| 6.5 | 100 | Eastern Han Dynasty | 10%
|
| 8.337 | 1889 | Empire of Brazil | 10%
|
| 6.0 | 557 | First Turkic Khanate | 10%
|
| 6.4 | 655 | Rashidun Caliphate | 10%
|
| 6.0 | 50BC | Western Han Dynasty | 10%
|
| 9.0 | 176BC | Xiongnu Empire | 10%
|
| 6.0 | 1310 | Golden Horde Khanate | 7%
|