RRB NTPC · Question 63
Insert the missing character marked as ‘?’.
| 3 | 15 | 4 |
|---|---|---|
| 7 | 38 | 5 |
| 3 | ? | 5 |
Show answer & explanation
Answer: (B) 18
Explanation
In each row, the middle number = first × third + 3: 3 × 4 + 3 = 15 and 7 × 5 + 3 = 38. So the missing number = 3 × 5 + 3 = 18.