| Hint | Answer | % Correct |
|---|---|---|
| 6,650 km | Nile River | 99%
|
| 6,575 km | Amazon River | 95%
|
| 6,300 km | Yangtze RIver | 83%
|
| 5,464 km | Yellow River | 76%
|
| 4,370 km | Congo River | 67%
|
| 4,350 km | Mekong River | 55%
|
| 4,180 km | Niger River | 50%
|
| 4,294 km | Lena River | 34%
|
| 4,248 km | Ob-Irtysh River | 17%
|
| 4,880 km | Plata River | 13%
|