1.

1, 3, 7, 15, 31, What is the sixth number in the series of numbers given above?1. 532. 633. 554. 65

Answer» Correct Answer - Option 2 : 63

1 + 21 = 3

3 + 22 = 7

7 + 23 = 15

15 + 24 = 31

31 + 25 = 31 + 32 = 63

∴ Sixth number in the series is 63



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