| Difficulty | Answer | % Correct |
|---|---|---|
| 5 | Congo | 100%
|
| 7 | Danube | 100%
|
| 6 | Niger | 100%
|
| 2 | Nile | 100%
|
| 8 | Thames | 100%
|
| 4 | Yellow | 100%
|
| 1 | Amazon | 94%
|
| 3 | Mississippi | 94%
|
| 9 | Tigris | 89%
|
| 12 | Loire | 83%
|
| 13 | Orange | 83%
|
| 14 | Yukon | 83%
|
| 21 | Mekong | 78%
|
| 18 | Volga | 78%
|
| 11 | Arkansas | 72%
|
| 10 | Columbia | 72%
|
| 20 | Murray | 72%
|
| 15 | Paraná | 72%
|
| 22 | Pearl | 72%
|
| 19 | Rhone | 72%
|
| 33 | Amur | 67%
|
| 37 | Brahmaputra | 67%
|
| 35 | Lena | 67%
|
| 23 | Po | 67%
|
| 36 | Ob | 61%
|
| 16 | Red | 61%
|
| 24 | Ebro | 56%
|
| 41 | Irrawaddy | 56%
|
| 25 | Orinoco | 56%
|
| 31 | Dniester | 50%
|
| 38 | Gambia | 50%
|
| 26 | MacKenzie | 50%
|
| 29 | Ural | 50%
|
| 27 | Volta | 50%
|
| 42 | Darling | 44%
|
| 17 | Limpopo | 44%
|
| 34 | Amu Darya | 39%
|
| 40 | Syr Darya | 39%
|
| 44 | Rio Negro | 22%
|
| 28 | São Francisco | 22%
|
| 32 | Tweed | 22%
|
| 39 | Glomma | 17%
|
| 43 | Jubba | 17%
|
| 49 | Chari | 11%
|
| 30 | James | 11%
|
| 46 | Narmada | 11%
|
| 47 | Oued Draa | 11%
|
| 50 | Onyx | 6%
|
| 48 | Mahakam | 0%
|
| 45 | Rio Lerma | 0%
|