| Answer | % Correct |
|---|---|
| Amazon | 97%
|
| Nile | 79%
|
| Congo | 75%
|
| Mississippi | 72%
|
| Danube | 69%
|
| Ganges | 63%
|
| Yangtze | 63%
|
| Yellow | 59%
|
| Mekong | 58%
|
| Volga | 58%
|
| Colorado | 53%
|
| Niger | 53%
|
| Rio Grande | 50%
|
| Zambezi | 46%
|
| Brahmaputra | 35%
|
| Dnieper | 35%
|
| Ural | 30%
|
| Mackenzie | 28%
|
| St. Lawrence | 28%
|
| Lower Tunguska | 13%
|