| Hint | Answer | % Correct |
|---|---|---|
| Nile | Rwanda or Burundi | 93%
|
| Yangtze | China | 91%
|
| Mississippi | USA | 86%
|
| Thames | England | 75%
|
| Uruguay | Brazil | 70%
|
| Paraguay | Brazil | 68%
|
| Paraná | Brazil | 68%
|
| Trent | England | 66%
|
| Lena | Russia | 64%
|
| Severn | Wales | 50%
|
| Amazon | Peru | 48%
|
| Volta | Burkina Faso | 39%
|
| Columbia | Canada | 34%
|
| Gambia | Guinea | 34%
|
| Niger | Guinea | 32%
|
| Senegal | Guinea | 32%
|
| St. Lawrence | USA | 30%
|
| Amur | China | 20%
|
| Yenisey | Mongolia | 16%
|
| Ob | China | 5%
|