| River #1 | River #2 | Merged into | Initial | Answer | % Correct |
|---|---|---|---|---|---|
| White Nile | Blue Nile | Nile | K | Khartoum | 96%
|
| Rhône | Saône | Rhône | L | Lyon | 93%
|
| Rio Solimões | Rio Negro | Amazon | M | Manaus | 93%
|
| Mississippi | Minnesota | Mississippi | M | Minneapolis | 86%
|
| Ottawa | Rideau | Ottawa | O | Ottawa | 86%
|
| Delaware | Schuylkill | Delaware | P | Philadelphia | 79%
|
| Allegheny | Monongahela | Ohio | P | Pittsburgh | 79%
|
| Columbia | Willamette | Columbia | P | Portland | 79%
|
| Mississippi | Missouri | Mississippi | W (or S) | West Alton (near St. Louis) | 75%
|
| Yangtze | Jialing | Yangtze | C | Chongqing | 71%
|
| Volga | Oka | Volga | N | Nizhny Novgorod | 64%
|
| Rhine | Main | Rhine | M | Mainz | 61%
|
| Rhine | Ruhr | Rhine | D | Duisburg | 57%
|
| Klang | Gombak | Klang | K | Kuala Lumpur | 36%
|
| Amur | Ussuri | Amur | K | Khabarovsk | 25%
|
| Volga | Kotorosl | Volga | Y | Yaroslavl | 25%
|