1.

What should come in place of the question mark '?' in the following number series?11, 23, 37, 53, 71, ?1. 832. 913. 934. 985. 87

Answer» Correct Answer - Option 2 : 91

Calculation

The series follows following pattern

9 × 1 + 2 = 11

10 × 2 + 3 = 23

11 × 3 + 4 = 37

12 × 4 + 5 = 53

13 × 5 + 6 = 71

14 × 6 + 7 = 91

∴ The value of ? is 91


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