| Question 16: 2 × 3 □ 6 | Pre-service teachers N = 71 | Teachers N = 149 | |||
| Justification | % | N | % | N | |
| Correctly answered | Pre-service teachers | 70 | Teachers | 128 | |
| None given. | 22.5 | 16 | 55.7 | 83 | |
| The sequence of numbers. | 53.5 | 38 | 28.9 | 43 | |
| Based on quantity. | 22.5 | 16 | 1.3 | 2 | |
| Incorrectly answered | Pre-service teachers | 1 | Teachers | 21 | |
| None given | 0 | 0 | 8.1 | 12 | |
| We didn’t learn this subject | 1.4 | 1 | 2 | 3 | |
| Because of the size of the numeral. | 0 | 0 | 4 | 6 | |