| Hint | Answer | % Correct |
|---|---|---|
| Vietnam | Mekong | 84%
|
| Pakistan | Indus | 79%
|
| South Africa | Orange | 64%
|
| Ireland | Shannon | 59%
|
| Ghana | Volta | 25%
|
| New Zealand | Waikato | 12%
|
| Japan | Shinano | 9%
|
| Morocco | Draa | 7%
|
| Guyana | Essequibo | 7%
|
| Mongolia | Orkhon | 4%
|