| Number | 2 First letters | Examples | % Correct |
|---|---|---|---|
| 4 | Ca | Cambodia, Canada, Cape Verde... | 95%
|
| 7 | Sa | Saint Kitts and Nevis, Samoa, Saudi Arabia... | 95%
|
| 3 | Un | United Arab Emirates, United Kingdom, United States | 95%
|
| 9 | Ma | Madagascar, Maldives, Mauritania... | 94%
|
| 5 | So | Solomon Islands, South Africa, South Sudan... | 94%
|
| 6 | Mo | Moldova, Mongolia, Morocco... | 90%
|
| 3 | Co | Colombia, Comoros, Costa Rica | 87%
|
| 3 | No | North Korea, North Macedonia, Norway | 87%
|
| 5 | Pa | Pakistan, Panama, Paraguay... | 87%
|
| 4 | Li | Liberia, Libya, Lithuania... | 85%
|
| 4 | Tu | Tunisia, Turkey, Tuvalu... | 85%
|
| 4 | Ba | Bahamas, Bahrain, Barbados... | 84%
|
| 4 | Be | Belarus, Belize, Benin... | 82%
|
| 3 | Ta | Taiwan, Tajikistan, Tanzania | 82%
|
| 3 | Bo | Bolivia, Bosnia and Herzegovina, Botswana | 81%
|
| 3 | Ch | Chad, Chile, China | 81%
|
| 3 | Ne | Nepal, Netherlands, New Zealand | 80%
|
| 3 | Ni | Nicaragua, Niger, Nigeria | 80%
|
| 3 | An | Andorra, Angola, Antigua and Barbuda | 75%
|
| 4 | Gu | Guatemala, Guinea, Guyana... | 73%
|
| 3 | Se | Senegal, Serbia, Seychelles | 73%
|
| 3 | Ir | Iran, Iraq, Ireland | 72%
|
| 3 | Bu | Bulgaria, Burkina Faso, Burundi | 70%
|