Question

1,3,7,15,31,65,127

1)7. 2) 31. 3)15. 4) 65

find the wrong number in the series and also with explanation
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Answer 1

Answer:

Starting with the first number ‘1’, we move ahead in the way given below:

1 x 2 + 1 = 3

3 x 2 + 1 = 7

7 x 2 + 1 = 15

15 x 2 + 1 = 31

31 x 2 + 1 = 63

63 x 2 + 1 = 127

Therefore 127 is the next number in the series.

Plz follow....