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Which number comes next in this series - 3, 7, 15, 31, 63, ?

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Which number comes next in this series - 3, 7, 15, 31, 63, ?
posted Mar 28, 2017 by Manish Tiwari

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3 Answers

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the next number is 2*63+1=127

answer Mar 28, 2017 by Kewal Panesar
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127.

Logic is multiply the number by 2 and add 1 to the product.

answer Apr 8, 2017 by Sreedevi K
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127
As 3+4=7
7+(2*4)=15
15+(2*8)=31
31+(2*16)=63
63+(2*32)=127

answer Apr 8, 2017 by Pratyush Pathak
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