Question

Identify the next number in the series

2, 3, 5, 9, 17, 33, 65, _______:

1. 120
2. 129
3. 145
4. 170

Answer 1

Correct Answer - Option 2 : 129

The logic followed here is:

2 + 1 = 3;

3 + 2 = 5;

5 + 4 = 9;

9 + 8 = 17;

17 + 16 = 33;

33 + 32 = 65;

65 + 64 = 129

Hence, '129' is the correct answer.