| Question | Select the number-pair in which the two numbers share a different relationship from in that shared by the two numbers the rest of the number-pairs. | |
| Type | multiple_choice | |
| Option | 22 : 490 | incorrect |
| Option | 25 : 631 | incorrect |
| Option | 21 : 447 | incorrect |
| Option | 30 : 908 | correct |
| Solution | 22 : 490 = 490 = 22 × 22 + 6 25 : 631 = 631 = 25 × 25 + 6 21 : 447 = 447 = 21 × 21 + 6 30 : 908 = 908 = 30 × 30 + 8 Hence, option D is different. | |
