Study the given pattern carefully and select the number from among the given options that can replace the question mark (?) in it.
| 15 | 81 | 12 |
| 18 | 99 | 15 |
| 17 | 120 | ? |
Show answer & explanation
Correct answer: B
Explanation
The correct answer is option 2 i.e. 13.
The logic used here is:
Row 1: (15 + 12) × (15 - 12) = 27 × 3 = 81
Row 2: (18 + 15) × (18 - 15) = 33 × 3 = 99
Row 3: (17 + x) × (17 - x) = 120 ⇒ x = 13