| Tributary | River | % Correct |
|---|---|---|
| Arkansas | Mississippi | 100%
|
| Yellowstone | Missouri | 92%
|
| Allegheny | Ohio | 91%
|
| Gila | Colorado | 89%
|
| Snake | Columbia | 86%
|
| Pecos | Rio Grande | 84%
|
| Ottawa | St. Lawrence | 75%
|
| Mohawk | Hudson | 72%
|
| Shenandoah | Potomac | 67%
|
| Canadian | Arkansas | 56%
|
| Tanana | Yukon | 55%
|
| Liard | Mackenzie | 39%
|
| Appomatox | James | 30%
|
| Merced | San Joaquin | 17%
|
| Chemung | Susquehanna | 13%
|
| Chattahoochee | Apalachicola | 8%
|