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Which number will come next in the follo...

Which number will come next in the following series? 1, 3, 7, 15, 31, 63, .......

A

129

B

127

C

125

D

126

Text Solution

Verified by Experts

The correct Answer is:
B
It follows the series `2^n -1,` where `n = 1,2,3,4.......`
So, next term will be ` = 2^7-1 = 127`.
Option B is correct.
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