| Africa | Km/mi | River | % Correct |
|---|---|---|---|
| 1 | 6,650/4,132 | Nile | 98%
|
| 1 | 6,400/3,977 | Amazon–Ucayali–Apurímac | 93%
|
| 1 | 6,275/3,902 | Mississippi–Missouri–Jefferson | 92%
|
| 2 | 2,888/1,795 | Danube–Breg | 91%
|
| 2 | 4,700/2,920 | Congo–Chambeshi (Zaïre) | 90%
|
| 1 | 3,645/2,266 | Volga | 89%
|
| 3 | 5,464/3,395 | Yellow River | 86%
|
| 1 | 6,300/3,915 | Yangtze | 82%
|
| 3 | 4,184/2,600 | Niger | 79%
|
| 4 | 2,574/1,599 | Zambezi | 73%
|
| 1 | 3,672/2,282 | Murray–Darling | 68%
|
| 4 | 3,057/1900 | Rio Grande | 65%
|
| 2 | 4,880/3,030 | Paraná–Rio de la Plata | 62%
|
| 4 | 5,410/3,361 | Ob–Irtysh | 59%
|
| 3 | 3,058/1900 | Saint Lawrence–Niagara–Detroit–Saint Clair–Saint Marys–Saint Louis | 51%
|
| 5 | 4,444/2,761 | Amur–Argun | 48%
|
| 2 | 4,241/2,635 | Mackenzie–Slave–Peace–Finlay | 45%
|
| 2 | 5,539/3,442 | Yenisei–Angara–Selenge | 36%
|
| 4 | 2,287/1,421 | Dnieper | 35%
|
| 5 | 1,870/1,162 | Don | 34%
|
| 3 | 2,428/1,509 | Ural | 30%
|
| 4 | 3,380/2,100 | Madeira–Mamoré–Grande–Caine–Rocha | 19%
|
| 3 | 3,650/2,658 | Tocantins–Araguaia | 15%
|
| 5 | 2,570/1,597 | Nelson–Saskatchewan | 12%
|
| 5 | 2,270/1,411 | Ubangi–Uele | 11%
|
| 5 | 3,211/1995 | Purús | 10%
|
| 4 | 1,420/882 | Cooper–Barcoo | 7%
|
| 2 | 1,600/994 | Murrumbidgee River | 6%
|
| 3 | 1,440/895 | Lachlan River | 4%
|
| 5 | 1,400/870 | Warburton–Georgina | 3%
|