| Letter | Number of time zones | Country | % Correct |
|---|---|---|---|
| R | 11 | Russia | 99%
|
| F | 12 | France | 98%
|
| Y | 1 | Yemen | 98%
|
| G | 1 | Gabon, Gambia, Georgia, etc. | 97%
|
| J | 1 | Jamaica, Japan, Jordan | 97%
|
| L | 1 | Laos, Latvia, Lebanon, etc. | 97%
|
| T | 1 | Taiwan, Tajikistan, Tanzania, etc. | 97%
|
| U | 11 | United States | 97%
|
| V | 1 | Vanuatu, Vatican City, Venezuela, etc. | 97%
|
| Z | 1 | Zambia, Zimbabwe | 97%
|
| Q | 1 | Qatar | 96%
|
| C | 6 | Canada | 95%
|
| O | 1 | Oman | 95%
|
| H | 1 | Haiti, Honduras, Hungary | 94%
|
| A | 9 | Australia | 92%
|
| B | 4 | Brazil | 92%
|
| D | 5 | Denmark | 92%
|
| I | 3 | Indonesia | 91%
|
| P | 2 | Papua New Guinea, Portugal | 86%
|
| S | 2 | South Africa, Spain | 81%
|
| M | 4 | Mexico | 75%
|
| E | 2 | Ecuador | 70%
|
| N | 5 | New Zealand | 70%
|
| K | 3 | Kiribati | 69%
|