Question

Find the wrong number in the following series.

2, 5, 12, 29, 58, 121

1. 58
2. 5
3. 12
4. 29
5. 121

Answer 1

Correct Answer - Option 4 : 29

Calculation:

Considering the above series,

2, 5, 12, 29, 58, 121

The logic of the series can be explained as,

2 × 2 + 1 = 5

5 × 2 + 2 = 12

12 × 2 + 3 = 27

27 × 2 + 4 = 58

58 × 2 + 5 = 121

27 should be in the place of 29

∴ The wrong number is 29.