| Answer | % Correct |
|---|---|
| Nile | 97%
|
| Amazon | 95%
|
| Mississippi | 95%
|
| Danube | 88%
|
| Yellow River | 84%
|
| Rhine | 81%
|
| Congo | 80%
|
| Yangtze | 77%
|
| Missouri | 76%
|
| Rio Grande | 75%
|
| Ganges | 74%
|
| Volga | 74%
|
| Tigris | 73%
|
| Colorado | 71%
|
| Euphrates | 71%
|
| Niger | 70%
|
| Mekong | 68%
|
| Indus | 60%
|
| Ohio | 57%
|
| Blue Nile | 54%
|
| Zambezi | 53%
|
| Yukon | 52%
|
| Dnieper | 50%
|
| Loire | 49%
|
| Saint Lawrence | 47%
|
| Ob | 42%
|
| Arkansas | 41%
|
| Orange | 39%
|
| Senegal | 36%
|
| Amur | 35%
|
| Columbia | 35%
|
| Pearl River | 34%
|
| Lena | 33%
|
| Murray | 33%
|
| Parana | 33%
|
| Vistula | 33%
|
| Brahmaputra | 30%
|
| Mackenzie | 30%
|
| Orinoco | 28%
|
| Uruguay | 27%
|
| Paraguay | 25%
|
| Tagus | 25%
|
| Yenisey | 23%
|
| Irrawaddy | 17%
|
| Rio Negro | 16%
|
| Amu Darya | 13%
|
| Syr Darya | 13%
|
| Irtysh | 10%
|
| Madeira | 9%
|
| Tocantins | 9%
|