| Letter | Number of reactors | Country | % Correct |
|---|---|---|---|
| C | 81 | China | 100%
|
| U | 94 | United States | 99%
|
| F | 63 | France | 96%
|
| R | 40 | Russia | 96%
|
| G | (36 reactors no longer operating) | Germany | 94%
|
| J | 14 | Japan | 93%
|
| I | 30 | India | 87%
|
| H | 4 | Hungary | 80%
|
| K | (1 reactor no longer operating) | Kazakhstan | 76%
|
| M | 2 | Mexico | 76%
|
| S | 28 | South Korea | 76%
|
| P | 6 | Pakistan | 75%
|
| A | 4 | Argentina | 72%
|
| B | 5 | Belgium | 72%
|
| L | (2 reactors no longer operating) | Lithuania | 65%
|
| E | 3 | Egypt | 62%
|
| N | 1 | Netherlands | 61%
|
| T | 2 | Taiwan | 44%
|