| Length | River | Country | % Correct |
|---|---|---|---|
| 6,300 | Yangtze | China | 100%
|
| 4,241 | Mackenzie | Canada | 99%
|
| 2,348 | Arkansas | United States | 99%
|
| 3,672 | Murray | Australia | 96%
|
| 4,400 | Lena | Russia | 91%
|
| 1,012 | Loire | France | 83%
|
| 1,047 | Vistula | Poland | 71%
|
| 3,650 | Tocantins | Brazil | 67%
|
| 1,465 | Godavari | India | 59%
|
| 2,170 | Ayeyarwady | Burma | 56%
|
| 2,010 | Northern Salado | Argentina | 45%
|
| 1,210 | Vaal | South Africa | 44%
|
| 1,550 | Magdalena | Colombia | 41%
|
| 1,415 | Marañón | Peru | 40%
|
| 1,599 | Beni | Bolivia | 29%
|
| 1,010 | Essequibo | Guyana | 29%
|
| 1,280 | Lomami | DR Congo | 25%
|
| 1,182 | Kızıl River | Turkey | 25%
|
| 1,143 | Kapuas | Indonesia | 15%
|
| 1,270 | Lerma | Mexico | 12%
|
| 1,100 | Draa | Morocco | 12%
|