Which of the following numbers will replace the question mark (?) in the given series?
1, 5, 17, 53, ?
Show answer & explanation
Correct answer: C
Explanation
The correct answer is option 3 i.e. 161.
1 + 4 = 5
5 + (4 × 3) = 5 + 12 = 17
17 + (12 × 3) = 17 + 36 = 53
53 + (36 × 3) = 53 + 108 = 161