| Km | Continent | Answer | % Correct |
|---|---|---|---|
| 6,650 | Africa | Nile | 99%
|
| 6,575 | S. America | Amazon | 96%
|
| 6,275 | N. America | Mississippi | 90%
|
| 5,464 | Asia | Yellow | 78%
|
| 4,700 | Africa | Congo | 73%
|
| 6,300 | Asia | Yangtze | 73%
|
| 3,645 | Europe | Volga | 70%
|
| 4,350 | Asia | Mekong | 63%
|
| 4,200 | Africa | Niger | 56%
|
| 3,610 | Asia | Indus | 55%
|
| 5,410 | Asia | Ob | 44%
|
| 3,672 | Australia | Murray | 42%
|
| 3,185 | N. America | Yukon | 41%
|
| 4,880 | S. America | Parana | 38%
|
| 4,400 | Asia | Lena | 37%
|
| 4,241 | N. America | Mackenzie | 37%
|
| 4,444 | Asia | Amur | 36%
|
| 5,539 | Asia | Yenisei | 31%
|
| 2,620 | Asia | Amu Darya | 16%
|
| 3,078 | Asia | Syr Darya | 15%
|