1.

What will come in place of question mark (?) in the following number series?5, 19, 41, 71, ?1. 52. 193. 414. 1095. 115

Answer» Correct Answer - Option 4 : 109

Calculation

The series follows following pattern

1 × 3 + 2 = 5

3 × 5 + 4 = 19

5 × 7 + 6 = 41

7 × 9 + 8 = 71

9 × 11 + 10 = 109

∴ The value of ? is 109


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