| Continent | Length | River | % Correct |
|---|---|---|---|
| Africa | 6,853 | Nile | 97%
|
| South America | 6,992 | Amazon | 92%
|
| North America | 6,275 | Mississippi | 89%
|
| Europe | 2,888 | Danube | 86%
|
| Asia | 5,464 | Yellow | 81%
|
| Europe | 3,645 | Volga | 79%
|
| Africa | 4,700 | Congo | 78%
|
| Asia | 6,300 | Yangtze | 73%
|
| Africa | 4,200 | Niger | 67%
|
| Africa | 2,693 | Zambezi | 57%
|
| North America | 3,057 | Rio Grande | 53%
|
| Oceania | 3,672 | Murray | 46%
|
| Asia | 5,410 | Ob | 42%
|
| North America | 3,185 | Yukon | 41%
|
| South America | 4,880 | Paraná | 37%
|
| North America | 3,058 | St. Lawrence | 36%
|
| Asia | 4,444 | Amur | 31%
|
| North America | 4,241 | Mackenzie | 30%
|
| Europe | 1,870 | Don | 28%
|
| Europe | 2,287 | Dnieper | 25%
|
| Asia | 5,539 | Yenisei | 22%
|
| Europe | 2,248 | Ural | 21%
|
| South America | 3,650 | Tocantins | 9%
|
| South America | 3,380 | Madeira | 8%
|
| South America | 3,211 | Purús | 6%
|
| Africa | 2,270 | Ubangi | 6%
|
| Oceania | 1,420 | Cooper | 3%
|
| Oceania | 1,600 | Murrumbidgee | 2%
|
| Oceania | 1,400 | Warburton | 2%
|