| River | Country | % Correct |
|---|---|---|
| Amazon, Paraná | Brazil | 100%
|
| Nile, Congo | Dem. Rep. Congo | 96%
|
| Nile | Egypt | 96%
|
| Amazon | Peru | 93%
|
| Nile | Sudan | 93%
|
| Congo | Republic of Congo | 92%
|
| Paraná | Paraguay | 91%
|
| Amazon | Venezuela | 91%
|
| Paraná | Argentina | 89%
|
| Amazon, Paraná | Bolivia | 89%
|
| Yangtze, Yellow, Ob, Amur | China | 89%
|
| Nile | South Sudan | 89%
|
| Amazon | Colombia | 87%
|
| Amazon | Ecuador | 87%
|
| Mississippi | United States | 87%
|
| Mississippi | Canada | 84%
|
| Paraná | Uruguay | 84%
|
| Nile | Ethiopia | 83%
|
| Amazon | Guyana | 83%
|
| Nile, Congo | Uganda | 83%
|
| Nile | Kenya | 80%
|
| Nile, Congo | Tanzania | 77%
|
| Yenisei, Ob, Amur | Russia | 76%
|
| Nile, Congo | Rwanda | 73%
|
| Congo | Central African Republic | 71%
|
| Nile, Congo | Burundi | 64%
|
| Nile | Eritrea | 61%
|
| Yenisei, Ob, Amur | Mongolia | 53%
|
| Congo | Angola | 52%
|
| Congo | Cameroon | 51%
|
| Ob | Kazakhstan | 51%
|
| Congo | Zambia | 49%
|