| Population | River Basin | % Correct |
|---|---|---|
| 360 m | Nile | 96%
|
| 100 m | Mississippi | 90%
|
| 200 m | Yellow | 84%
|
| 80 m | Danube | 80%
|
| 600 m | Ganges / Brahmaputra | 79%
|
| 420 m | Yangtze | 76%
|
| 50 m | Rhine | 69%
|
| 55 m | Volga | 66%
|
| 60 m | Congo | 63%
|
| 60 m | Mekong | 58%
|
| 50 m | Tigris / Euphrates | 57%
|
| 300 m | Indus | 56%
|
| 100 m | Niger | 47%
|
| 100 m | Paraná / Rio de la Plata | 30%
|
| 50 m | St. Lawrence | 27%
|
| 250 m | Pearl | 24%
|
| 75 m | Amur | 16%
|
| 60 m | Godavari | 4%
|
| 70 m | Krishna | 4%
|