| Length (km) | River | % Correct |
|---|---|---|
| 6650 | Nile | 100%
|
| 4700 | Congo | 96%
|
| 4200 | Niger | 90%
|
| 3540 | Zambezi | 85%
|
| 2290 | Orange | 76%
|
| 1450 | Blue Nile | 75%
|
| 1640 | Senegal | 68%
|
| 3700 | White Nile | 62%
|
| 1120 | Gambia | 54%
|
| 1800 | Limpopo | 52%
|
| 1600 | Volta | 45%
|
| 1600 | Okavango | 32%
|
| 1060 | Ubangi | 26%
|
| 875 | Jubba | 19%
|
| 2150 | Kasai | 18%
|
| 1210 | Vaal | 15%
|
| 1080 | Benue | 11%
|
| 1820 | Shebeli | 10%
|
| 1210 | Uele | 10%
|
| 1400 | Chari | 9%
|
| 1100 | Draa | 8%
|
| 1800 | Lualaba | 8%
|
| 705 | Tana | 8%
|
| 730 | Kwando | 6%
|
| 960 | Cuanza | 5%
|
| 945 | Cunene | 5%
|
| 1800 | Kwango | 5%
|
| 805 | Atbara | 4%
|
| 1160 | Black Volta | 4%
|
| 1600 | Kafue | 4%
|
| 1000 | Molopo | 4%
|
| 1200 | Ogooué | 4%
|
| 760 | Ruvuma | 4%
|
| 1200 | Awash | 3%
|
| 725 | Chelif | 3%
|
| 690 | Great Fish | 3%
|
| 750 | Komoé | 3%
|
| 1280 | Lomami | 3%
|
| 800 | Luangwa | 3%
|
| 800 | Al-'Arab | 2%
|
| 715 | Al-Ghazal | 2%
|
| 1000 | Logone | 2%
|
| 955 | Al-Jabal | 1%
|
| 800 | Bandama | 1%
|
| 725 | Bomu | 1%
|
| 720 | Dja | 1%
|
| 725 | Kouilou | 1%
|
| 740 | Nossob | 1%
|
| 1200 | Sankuru | 1%
|
| 755 | Tekeze | 1%
|