| km | river | miles | % Correct |
|---|---|---|---|
| 6,650 | Nile | 4,130 | 98%
|
| 6,400 | Amazon | 3,976 | 95%
|
| 6,275 | Mississippi | 3,902 | 88%
|
| 2,888 | Danube | 1,795 | 78%
|
| 5,464 | Yellow | 3,395 | 77%
|
| 6,300 | Yangtze | 3,917 | 70%
|
| 3,645 | Volga | 2,266 | 66%
|
| 4,700 | Congo | 2,922 | 63%
|
| 3,969 | Brahmaputra / Ganges | 2,466 | 59%
|
| 4,350 | Mekong | 2,705 | 52%
|
| 3,596 | Shatt al-Arab | 2,236 | 51%
|
| 4,200 | Niger | 2,611 | 50%
|
| 3,610 | Indus | 2,250 | 45%
|
| 3,057 | Rio Grande | 1,900 | 44%
|
| 2,740 | Zambezi | 1,703 | 37%
|
| 5,410 | Ob | 3,364 | 33%
|
| 4,400 | Lena | 2,736 | 27%
|
| 3,185 | Yukon | 1,980 | 27%
|
| 3,672 | Murray | 2,282 | 26%
|
| 4,444 | Amur | 2,763 | 25%
|
| 4,880 | Paraná | 3,030 | 25%
|
| 3,058 | Saint Lawrence | 1,900 | 25%
|
| 4,241 | Mackenzie | 2,637 | 20%
|
| 5,539 | Yenisei | 3,445 | 20%
|
| 2,809 | Irrawaddy | 1,857 | 10%
|
| 3,078 | Syr Darya | 1,913 | 8%
|
| 3,180 | São Francisco | 1,976 | 7%
|
| 3,060 | Salween | 1,901 | 6%
|
| 3,650 | Tocantins | 2,270 | 6%
|