| Question | Based on a certain logic, the numbers are related to each other. Find the number that must replace the ‘?’. 643 : 21 : 765 : 37 :: 284 : ? | |
| Type | multiple_choice | |
| Option | 21 | incorrect |
| Option | 15 | incorrect |
| Option | 24 | incorrect |
| Option | 12 | correct |
| Solution | 6 × 4 – 3 = 24 – 3 = 21 7 × 6 – 5 = 42 – 5 = 37 Similarly, 2 × 8 – 4 = 16 – 4 = 12 | |
