| River | Country | % Correct |
|---|---|---|
| Niger | Niger | 98%
|
| Niger | Nigeria | 98%
|
| Rhine | Germany | 97%
|
| Brahmaputra | India | 97%
|
| Mekong | China | 96%
|
| Brahmaputra | China | 96%
|
| Rio Grande | Mexico | 95%
|
| Rio Grande | United States | 95%
|
| Brahmaputra | Bangladesh | 93%
|
| Paraná | Brazil | 93%
|
| Rhine | Austria | 92%
|
| Mekong | Cambodia | 92%
|
| Mekong | Laos | 92%
|
| Rhine | Switzerland | 92%
|
| Mekong | Vietnam | 92%
|
| Zambezi | Zambia | 92%
|
| Paraná | Argentina | 91%
|
| Mekong | Thailand | 90%
|
| Rhine | France | 89%
|
| Paraná | Paraguay | 89%
|
| Niger | Mali | 88%
|
| Zambezi | Zimbabwe | 87%
|
| Mekong | Myanmar | 86%
|
| Rhine | Netherlands | 85%
|
| Zambezi | Botswana | 82%
|
| Zambezi | Mozambique | 79%
|
| Zambezi | Namibia | 79%
|
| Zambezi | Angola | 78%
|
| Rhine | Liechtenstein | 77%
|
| Niger | Benin | 71%
|
| Tisza | Romania | 71%
|
| Tisza | Hungary | 70%
|
| Tisza | Slovakia | 66%
|
| Tisza | Serbia | 62%
|
| Tisza | Ukraine | 59%
|
| Niger | Guinea | 48%
|