| Span | Country | % Correct |
|---|---|---|
| 4,065 km | Russia | 98%
|
| 2,695 km | United States | 98%
|
| 3,335 km | Canada | 97%
|
| 4,042 km | Chile | 97%
|
| 4,331 km | Brazil | 95%
|
| 3,700 km | China | 95%
|
| 3,398 km | Argentina | 94%
|
| 3,159 km | Australia | 92%
|
| 2,796 km | India | 92%
|
| 2,019 km | Mexico | 89%
|
| 2,086 km | D. R. Congo | 79%
|
| 1,983 km | Algeria | 75%
|
| 1,749 km | Saudi Arabia | 71%
|
| 2,043 km | Peru | 69%
|
| 1,778 km | Chad | 59%
|
| 1,651 km | Thailand | 58%
|
| 1,858 km | Colombia | 55%
|
| 1,679 km | Morocco | 50%
|
| 1,811 km | Mozambique | 47%
|
| 2,062 km | Myanmar | 45%
|