| Border | Country | % Correct |
|---|---|---|
| United States | Canada | 98%
|
| United States | Mexico | 96%
|
| Brazil | Argentina | 94%
|
| China/India | Nepal | 94%
|
| China/Russia | North Korea | 94%
|
| China/India | Pakistan | 94%
|
| China/Pakistan | Afghanistan | 93%
|
| China/Russia | Kazakhstan | 93%
|
| China/Russia | Mongolia | 92%
|
| Brazil | Uruguay | 92%
|
| China/India | Bhutan | 91%
|
| Brazil | Paraguay | 91%
|
| China | Vietnam | 91%
|
| India | Bangladesh | 90%
|
| China | Laos | 90%
|
| Brazil | Bolivia | 89%
|
| Brazil | Colombia | 88%
|
| Brazil | Guyana | 88%
|
| China/Bangladesh/India | Myanmar | 88%
|
| Nigeria | Niger | 88%
|
| Brazil | Suriname | 88%
|
| Brazil | Venezuela | 88%
|
| China/Bangladesh/Pakistan | India | 87%
|
| Brazil | Peru | 87%
|
| China | Tajikistan | 86%
|
| China | Kyrgyzstan | 85%
|
| China | Russia | 85%
|
| Russia | Ukraine | 85%
|
| India/Pakistan/Russia | China | 83%
|
| Pakistan | Iran | 82%
|
| Russia | Latvia | 82%
|
| Indonesia | Malaysia | 82%
|
| Russia | Estonia | 81%
|
| Russia | Finland | 81%
|
| Russia | Lithuania | 81%
|
| Russia | Belarus | 80%
|
| Russia | Azerbaijan | 78%
|
| Brazil | France | 78%
|
| Russia | Georgia | 78%
|
| Russia | Poland | 76%
|
| Nigeria | Cameroon | 75%
|
| Indonesia | East Timor | 75%
|
| Nigeria | Benin | 74%
|
| Nigeria | Chad | 70%
|
| Indonesia | Papua New Guinea | 69%
|
| Russia | Norway | 68%
|