| 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 | 19 : 68 | incorrect |
| Option | 23 : 84 | incorrect |
| Option | 13 : 90 | correct |
| Option | 17 : 60 | incorrect |
| Solution | 19 : 68 = 68 = 19 × 4 – 8 23 : 84 = 84 = 23 × 4 – 8 13 : 90 = 90 = 13 × 7 – 1 17 : 60 = 60 = 17 × 4 – 8 Hence, option C is different. | |
