| Length | River | % Correct |
|---|---|---|
| 4,132 | Nile | 97%
|
| 3,976 | Amazon | 94%
|
| 3,902 | Mississippi | 93%
|
| 1,796 | Danube | 92%
|
| 3,395 | Yellow | 91%
|
| 2,226 | Volga | 90%
|
| 2,922 | Congo | 88%
|
| 3,917 | Yangtse | 87%
|
| 2,611 | Niger | 81%
|
| 1,450 | Colorado | 79%
|
| 2,705 | Mekong | 77%
|
| 1,673 | Zambezi | 76%
|
| 2,282 | Murray | 74%
|
| 1,900 | Rio Grande | 74%
|
| 1,976 | Indus | 67%
|
| 1,980 | Yukon | 67%
|
| 3,030 | Parana | 65%
|
| 1,900 | St. Lawrence | 62%
|
| 3,364 | Ob | 60%
|
| 2,736 | Lena | 54%
|
| 2,637 | Mackenzie | 54%
|
| 2,763 | Amur | 53%
|
| 1,450 | Columbia | 49%
|
| 1,300 | Orange | 49%
|
| 1,421 | Dnieper | 48%
|
| 3,445 | Yenisei | 47%
|
| 2,236 | Shatt al-Arab | 43%
|
| 1,360 | Red | 40%
|
| 1,162 | Don | 39%
|
| 1,509 | Ural | 39%
|
| 1,459 | Arkansas | 37%
|
| 877 | Dniester | 28%
|
| 1,976 | Sao Francisco | 26%
|
| 994 | Blue Nile | 24%
|
| 1,584 | Paraguay | 24%
|
| 1,118 | Limpopo | 23%
|
| 1,597 | Nelson | 21%
|
| 1,020 | Senegal | 21%
|
| 2,270 | Tocantins | 18%
|
| 1,410 | Ubangi | 16%
|
| 1,995 | Purus | 15%
|
| 932 | Oka | 13%
|
| 1,913 | Syr Darya | 13%
|
| 1,112 | Kama | 11%
|
| 1,338 | Kasai | 8%
|
| 1,124 | Pechora | 8%
|
| 994 | Murrumbidgee | 7%
|
| 882 | Belaya | 5%
|
| 880 | Cooper | 4%
|
| 1,625 | Japura | 3%
|
| 1,632 | Araguaia | 2%
|
| 1,498 | Jurua | 2%
|
| 1,553 | Pilcomayo | 2%
|
| 870 | Warburton | 2%
|