| Border length | Answer | % Correct |
|---|---|---|
| 4.4 km | France-Monaco | 82%
|
| 3.2 km | Italy-Vatican | 82%
|
| 34.9 km | Liechtenstein-Austria | 60%
|
| 19 km | North Korea-Russia | 56%
|
| 1.2 km | Gibraltar-Spain | 33%
|
| 156 m | Botswana-Zambia | 29%
|
| 17 km | Morocco-Spain | 29%
|
| 118 m | India-Sri Lanka | 22%
|
| 9 km | Azerbaijan-Turkey | 20%
|
| 25 km | Croatia-montenegro | 20%
|