| Problem | Answer | % Correct |
|---|---|---|
| 13 x 1 | 13 | 95%
|
| 13 x 2 | 26 | 94%
|
| 13 x 3 | 39 | 93%
|
| 13 x 4 | 52 | 92%
|
| 13 x 10 | 130 | 91%
|
| 13 x 5 | 65 | 91%
|
| 13 x 6 | 78 | 90%
|
| 13 x 7 | 91 | 89%
|
| 13 x 8 | 104 | 88%
|
| 13 x 9 | 117 | 88%
|
| 13 x 11 | 143 | 87%
|
| 13 x 12 | 156 | 85%
|
| 13 x 13 | 169 | 84%
|