| Question | Four number-pairs have been given, out of which three are alike in some manner and one is different. Select the number- pair that is different. | |
| Type | multiple_choice | |
| Option | 169 : 52 | incorrect |
| Option | 289 : 68 | incorrect |
| Option | 256 : 64 | incorrect |
| Option | 324 : 90 | correct |
| Solution | 169 : 52 = 132 : 52 = 13 : 13 × 4 289 : 68 = 172 : 68 = 17 : 17 × 4 256 : 64 = 162 : 64 = 16 : 16 × 4 324 : 90 = 182 : 90 = 18 : 18 × 5 Hence option D is different. | |
