| Hint | Answer | % Correct |
|---|---|---|
| Missouri, Illinois | Mississippi River | 95%
|
| Indiana, Kentucky | Ohio River | 91%
|
| California, Arizona | Colorado River | 86%
|
| Nebraska, Iowa | Missouri River | 82%
|
| Virginia, Maryland | Potomac River | 82%
|
| Idaho, Oregon | Snake River | 82%
|
| Texas, Oklahoma | Red River | 77%
|
| Washington, Oregon | Columbia River | 73%
|
| Pennsylvania, New York | Delaware River | 45%
|
| New Hampshire, Vermont | Connecticut River | 27%
|
| Texas, Louisiana | Sabine River | 23%
|
| South Carolina, Georgia | Savannah River | 18%
|