| Country | Longest Border | % Correct |
|---|---|---|
| Belarus, Finland, Georgia, Kazakhstan and Ukraine | Russia | 100%
|
| Belgium and Monaco | France | 99%
|
| Austria, Czech Republic, Denmark, Netherlands | Germany | 99%
|
| Andorra, France and Portugal | Spain | 99%
|
| Ireland | United Kingdom | 98%
|
| Burma, Mongolia and North Korea | China | 97%
|
| Bulgaria and Serbia | Romania | 97%
|
| Bosnia & Herzegovina and Slovenia | Croatia | 96%
|
| Albania, Macedonia | Greece | 96%
|
| Norway | Sweden | 96%
|
| Bangladesh, Bhutan, Nepal and Pakistan | India | 95%
|
| East Timor, Malaysia and Papua New Guinea | Indonesia | 95%
|
| San Marino, Switzerland and Vatican City | Italy | 95%
|
| Canada and Mexico | United States | 95%
|
| Croatia and Montenegro | Bosnia and Herzegovina | 94%
|
| Russia and Uzbekistan | Kazakhstan | 94%
|
| Estonia | Latvia | 94%
|
| Sweden | Norway | 94%
|
| Jordan, Oman, Qatar, United Arab Emirates and Yemen | Saudi Arabia | 94%
|
| Kosovo | Serbia | 94%
|
| Italy and Liechtenstein | Switzerland | 94%
|
| Bolivia, Guyana, Peru, Urugay and Venezuela | Brazil | 93%
|
| United States | Canada | 93%
|
| Iraq | Iran | 93%
|
| Kuwait | Iraq | 93%
|
| Afghanistan | Pakistan | 93%
|
| Syria | Turkey | 93%
|
| Moldova | Ukraine | 93%
|
| Chile and Paraguay | Argentina | 92%
|
| Greece and Romania | Bulgaria | 92%
|
| United Kingdom | Ireland | 92%
|
| Latvia | Lithuania | 92%
|
| Guatemala | Mexico | 92%
|
| Cambodia and Laos | Vietnam | 92%
|
| Luxembourg | Belgium | 91%
|
| Argentina | Chile | 91%
|
| Israel and Libya | Egypt | 91%
|
| Brunei and Indonesia | Malaysia | 91%
|
| China | Mongolia | 91%
|
| Spain | Portugal | 91%
|
| Lithuania | Belarus | 90%
|
| Haiti | Dominican Republic | 89%
|
| Dominican Republic | Haiti | 89%
|
| Slovakia | Hungary | 89%
|
| Ecuador | Peru | 89%
|
| El Salvador, Nicaragua | Honduras | 88%
|
| Hungary | Slovakia | 88%
|
| Botswana, Lesotho and Swaziland | South Africa | 88%
|
| Lebanon and Turkey | Syria | 88%
|
| Angola, Central African Republic, Rep. Congo and Zambia | DR of the Congo | 87%
|
| Belize | Guatemala | 87%
|
| South Korea | North Korea | 87%
|
| Costa Rica | Panama | 87%
|
| Gabon | Republic of the Congo | 87%
|
| Chad, Egpyt and South Sudan | Sudan | 87%
|
| Colombia | Venezuela | 87%
|
| Honduras | Nicaragua | 86%
|
| Brazil | Bolivia | 85%
|
| Thailand | Burma | 85%
|
| Panama | Costa Rica | 85%
|
| Algeria | Morocco | 85%
|
| Benin, Cameroon and Niger | Nigeria | 85%
|
| Azerbajian | Armenia | 84%
|
| Armenia | Azerbaijan | 84%
|
| Vietnam | Laos | 84%
|
| Saudi Arabia | Yemen | 84%
|
| Suriname | Guyana | 83%
|
| Burkina Faso, Guinea and Mauritania | Mali | 83%
|
| Kyrgyzstan and Turkmenistan | Uzbekistan | 83%
|
| Tajikistan | Afghanistan | 81%
|
| Morocco and Tunisia | Algeria | 81%
|
| India | Bangladesh | 81%
|
| Djibouti, Eritrea and Somalia | Ethiopia | 81%
|
| Burundi | Tanzania | 78%
|
| Iran | Turkmenistan | 78%
|
| Germany and Poland | Czech Republic | 76%
|
| Ethiopia | Somalia | 76%
|
| Gambia | Senegal | 75%
|
| DR of the Congo and Namibia | Angola | 74%
|
| Togo | Ghana | 74%
|
| Malawi and Zimbabwe | Mozambique | 74%
|
| Tanzania and Uganda | Kenya | 73%
|
| Ghana | Togo | 73%
|
| Guinea-Bissau and Sierra Leone | Guinea | 72%
|
| Mali and Senegal | Mauritania | 72%
|
| Sudan | South Sudan | 72%
|
| Equatorial Guinea | Gabon | 71%
|
| Kenya | Uganda | 71%
|
| Nigeria | Cameroon | 68%
|
| South Africa | Botswana | 67%
|
| Liberia | Côte d'Ivoire | 63%
|
| Cote d'Ivoire | Liberia | 60%
|
| Rwanda | Burundi | 58%
|
| Mozambique | Malawi | 58%
|