| Hint | Answer | % Correct |
|---|---|---|
| 224,000 | Amazon | 98%
|
| 6550 | Danube | 90%
|
| 18,690 | Ganges | 90%
|
| 18,430 | Mississippi | 88%
|
| 8220 | Volga | 88%
|
| 35,000 | Yangtze | 88%
|
| 41,200 | Congo | 87%
|
| 16,000 | Mekong | 83%
|
| 37,740 | Orinoco | 75%
|
| 19,710 | Paraná | 75%
|
| 11,330 | Amur | 73%
|
| 7900 | Niger | 73%
|
| 17,070 | Lena | 72%
|
| 7960 | Ohio | 72%
|
| 16,800 | Saint Lawrence | 72%
|
| 13,100 | Ob | 70%
|
| 43,900 | Meghna | 68%
|
| 19,800 | Yenisei | 67%
|
| 6800 | Yukon | 65%
|
| 10,340 | Mackenzie | 60%
|
| 35,940 | Negro | 60%
|
| 7500 | Columbia | 57%
|
| 9500 | Pearl River | 57%
|
| 15,110 | Irrawaddy | 50%
|
| 11,800 | Tocantins | 43%
|
| 7060 | Uruguay | 38%
|
| 31,200 | Madeira | 37%
|
| 6600 | Salween | 33%
|
| 9680 | Xingu | 25%
|
| 7200 | Magdalena | 20%
|
| 10,970 | Purus | 20%
|
| 11,320 | Kasai | 18%
|
| 13,540 | Tapajós | 17%
|
| 18,120 | Japurá | 15%
|
| 9350 | Beni | 8%
|
| 7500 | Fly | 8%
|
| 16,710 | Marañón | 8%
|
| 8520 | Putumayo | 7%
|
| 7000 | Sepik | 7%
|
| 66060 | Napo | 2%
|