| Hint | Answer | % Correct |
|---|---|---|
| A | Amazon | Amur | Argun | Araguaia | Amu Darya | Arkansas | Aldan | Alazeya | 96%
|
| N | Nile | Niger | Negro | 96%
|
| M | Mississippi | Missouri | Mekong | Mackenzie | Murray | Mamoré | Marañón | Magdalena | 95%
|
| D | Danube | Dnieper | Don | 94%
|
| Y | Yangtze | Yenisei | Yellow | Yukon | Yalong | 94%
|
| C | Congo | Colorado | Columbia | Chenab | Chulym | Churchill | 91%
|
| O | Ob | Orange | Olenyok | Ohio | Orinoco | Okavango | Oka | 82%
|
| G | Ganges | Guaviare | 80%
|
| V | Volga | Vilyuy | Vitim | Volta | 79%
|
| R | Rio Grande | Red | 73%
|
| Z | Zambezi | 71%
|
| I | Irtysh | Indus | Irrawaddy | Ishim | Indigirka | 69%
|
| E | Euphrates | 66%
|
| T | Tocantins | Tigris | Tobol | 64%
|
| P | Parana | Peace | Purús | Paraguay | Putumayo | Pechora | Platte | Pearl | 62%
|
| L | Lualaba | Lena | Lower Tunguska | Limpopo | 45%
|
| S | São Francisco | Syr Darya | Salween | Songhua | Snake | Shebelle | Stony Tunguska | Senegal | 45%
|
| X | Xi | Xingu | 43%
|
| U | Ucayali | Ural | Uruguay | 40%
|
| B | Brahmaputra | Beni | 39%
|
| H | Han | 30%
|
| W | White Nile | 21%
|
| K | Kolyma | Kasai | Kama | Kafue | Kura | 9%
|
| J | Jinsha | Japurá | Juruá | Jubba | 8%
|