| Question | Select the number-pair in which the two numbers are related in het same way as are two numbers of the given number pair 67: 171 | |
| Type | multiple_choice | |
| Option | 25: 51 | correct |
| Option | 23: 25 | incorrect |
| Option | 21: 12 | incorrect |
| Option | 42: 75 | incorrect |
| Solution | (6 + 7)² + 2 = 171 (2 + 5)² + 2 = 51 | |
