| Size(Million km^2) | % of world | Year | Answer | % Correct |
|---|---|---|---|---|
| 35.5 | 26.35% | 1920 | British Empire | 93%
|
| 24.0 | 17.81% | 1270 or 1309 | Mongol Empire | 85%
|
| 13.7 | 10.17% | 1810 | Spanish Empire | 78%
|
| 22.8 | 16.92% | 1895 | Russian Empire | 73%
|
| 5.0 | 3.71% | 117 | Roman Empire | 70%
|
| 5.2 | 3.86% | 1683 | Ottoman Empire | 68%
|
| 7.4 | 5.49% | 1942 | Empire of Japan | 58%
|
| 5.5 | 4.08% | 500 BC | Achaemenid Empire | 53%
|
| 14.7 | 10.91% | 1790 | Qing Dynasty | 45%
|
| 11.5 | 8.53% | 1920 | Second French Colonial Empire | 43%
|
| 5.5 | 4.08% | 1820 | Second Portuguese Empire | 30%
|
| 8.337 | 6.19% | 1889 | Empire of Brazil | 28%
|
| 5.0 | 3.71% | 1368 | Northern Yuan Dynasty | 28%
|
| 11.1 | 8.24% | 720 | Umayyad Caliphate | 28%
|
| 11.0 | 8.16% | 1310 | Yuan Dynasty | 28%
|
| 11.1 | 8.24% | 750 | Abbasid Calliphate | 25%
|
| 6.5 | 4.82% | 100 | Eastern Han Dynasty | 25%
|
| 6.0 | 4.45% | 50 BC | Western Han Dynasty | 25%
|
| 5.2 | 3.86% | 323 BC | Macedonian Empire | 23%
|
| 6.5 | 4.82% | 1450 | Ming Dynasty | 20%
|
| 5.4 | 4.01% | 715 | Tang Dynasty | 15%
|
| 4.6 | 3.41% | 800 | Tibetan Empire | 13%
|
| 9.0 | 6.68% | 176 BC | Xiongnu Empire | 13%
|
| 6.0 | 4.45% | 557 | First Turkic Khaganate | 10%
|
| 6.0 | 4.45% | 1310 | Golden Horde Khanate | 10%
|
| 6.4 | 4.75% | 655 | Rashidun Caliphate | 10%
|
| 4.7 | 3.49% | 10 | Xin Dynasty | 10%
|
| 4.429 | 3.29% | 1821 | First Mexican Empire | 8%
|
| 7.1 | 5.27% | 1640 | Iberian Union | 8%
|
| 4.5 | 3.34% | 200 | Xianbei State | 8%
|