What will come at the place of question mark?
5, 9, 17, 33, 65, ?
Show answer & explanation
Correct answer: A
Explanation
The correct answer is option 1 i.e. 129.
Given series: 5, 9, 17, 33, 65, ?
5 × 2 - 1 = 9
9 × 2 - 1 = 17
17 × 2 - 1 = 33
33 × 2 - 1 = 65
65 × 2 - 1 = 129