1.

What will come in place of question mark (?) in the following number series?  4, 9, 19, 39, ?1. 242. 793. 684. 29

Answer» Correct Answer - Option 2 : 79

Calculation:

4

⇒ 4 × 2 + 1 = 9

⇒ 9 × 2 + 1 = 19

⇒ 19 × 2 + 1 = 39

⇒ 39 × 2 + 1 = 79

∴ 79 will be next number in this series.

The correct option is 2 i.e. 79.



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