| Border | % Correct |
|---|---|
| Idaho-Montana | 100%
|
| Idaho-Utah | 94%
|
| Arizona-Utah | 92%
|
| Colorado-Utah | 92%
|
| Illinois-Indiana | 92%
|
| Colorado-Nebraska | 91%
|
| Nebraska-Wyoming | 91%
|
| Iowa-Nebraska | 89%
|
| Nebraska-South Dakota | 89%
|
| Indiana-Ohio | 86%
|
| Colorado-Oklahoma | 84%
|
| Indiana-Michigan | 84%
|
| Alabama-Georgia | 83%
|
| Iowa-South Dakota | 83%
|
| Indiana-Kentucky | 81%
|
| Alabama-Tennessee | 77%
|
| Kansas-Missouri | 77%
|
| Georgia-South Carolina | 75%
|
| Massachusetts-New York | 72%
|
| Massachusetts-Rhode Island | 53%
|