Question 11

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

it follows the series of $$2^n-1,\ where\ n=1,2,3,4.....$$.

So,next term will be= $$2^7-1=127.$$

Option B is correct.

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