| Hint | Answer | % Correct |
|---|---|---|
| Uganda, South Sudan, Sudan, Egypt | Nile | 100%
|
| Germany, Hungary, Romania | Danube | 96%
|
| Turkey, Syria, Iraq | Euphrates/Tigris | 85%
|
| Switzerland, Germany, Netherlands | Rhine | 81%
|
| China, Laos, Vietnam | Mekong | 77%
|
| Bourgogne-Franche-Comté, Île-de-France, Normandy | Seine | 77%
|
| Colorado, Chihuahua, Texas | Rio Grande | 73%
|
| China, India, Pakistan | Indus | 69%
|
| Lebanon, Syria, Israel | Jordan | 69%
|
| Zambia, Zimbabwe, Mozambique | Zambezi | 69%
|
| Guinea, Mali, Nigeria | Niger | 65%
|
| Quebec, Ontario, New York | St. Lawrence | 65%
|
| Russia, Belarus, Ukraine | Dnieper | 58%
|
| New South Wales, Victoria, South Australia | Murray | 54%
|
| Lesotho, South Africa, Namibia | Orange | 54%
|
| Colombia, Venezuela | Orinoco | 54%
|
| Tuscany, Umbria, Lazio | Tiber | 54%
|
| Brazil, Paraguay, Argentina | Parana | 46%
|
| British Columbia, Washington, Oregon | Columbia | 38%
|
| Castile and León, Aveiro, Porto | Douro | 38%
|
| Altai Krai, Novosibirsk Oblast, Khanty-Mansi Autonomous Okrug | Ob | 38%
|
| Gangwon, Seoul, North Hwanghae | Han | 31%
|
| Yunnan, Guangxi, Hong Kong | Pearl | 31%
|
| Burkina Faso, Ivory Coast, Ghana | Volta | 31%
|
| New York, New Jersey, Pennsylvania | Delaware | 23%
|