| Country | Length (km) | River | % Correct |
|---|---|---|---|
| United States | 3767 | Missouri | 80%
|
| Italy | 652 | Po | 76%
|
| China | 6301 | Yangtze | 65%
|
| France | 1012 | Loire | 61%
|
| Russia | 4337 | Lena | 50%
|
| Spain | 930 | Ebro | 35%
|
| Germany | 526 | Main | 24%
|
| Colombia | 1528 | Magdalena | 13%
|
| Brazil | 2829 | Sao Francisco | 11%
|
| India | 1465 | Godavari | 4%
|
| Mexico | 875 | Culiacan | 2%
|
| Argentina | 1150 | Salado | 2%
|
| South Africa | 1120 | Vaal | 2%
|
| Nigeria | 550 | Kaduna | 0%
|
| Iran | 950 | Karun | 0%
|