| Border | % Correct |
|---|---|
| Montana-South Dakota | 97%
|
| Montana-Wyoming | 94%
|
| Colorado-Wyoming | 92%
|
| Idaho-Washington | 92%
|
| Kansas-Missouri | 92%
|
| Illinois-Missouri | 87%
|
| New Mexico-Texas | 87%
|
| Illinois-Wisconsin | 86%
|
| Idaho-Utah | 83%
|
| Kentucky-Ohio | 83%
|
| Colorado-Oklahoma | 79%
|
| Iowa-Minnesota | 78%
|
| Massachusetts-New Hampshire | 71%
|
| Alabama-Florida | 67%
|
| Georgia-North Carolina | 67%
|
| Maryland-Pennsylvania | 59%
|
| Massachusetts-Rhode Island | 57%
|
| Maryland-West Virginia | 44%
|
| Delaware-Maryland | 43%
|
| Delaware-Pennsylvania | 35%
|