| State | Longest Border | % Correct |
|---|---|---|
| California | Nevada | 97%
|
| Mississippi | Louisiana | 95%
|
| Texas | Oklahoma | 95%
|
| Michigan | Indiana | 92%
|
| Wyoming | Montana | 92%
|
| Maine | New Hampshire | 89%
|
| Washington | Oregon | 89%
|
| Colorado | New Mexico | 87%
|
| North Dakota | South Dakota | 87%
|
| New Mexico | Texas | 87%
|
| New Jersey | Pennsylvania | 84%
|
| Montana | Idaho | 82%
|
| Tennessee | Kentucky | 82%
|
| Virginia | West Virginia | 82%
|
| Missouri | Illinois | 79%
|