Question

( 1 ) : 3 , 7 , 15 , ? , 63 , 127
( A ) = 30
( B ) = 31
( C ) = 47
( D ) = 52​

Answer 1

Answer:

Each number in the series is one more than twice the preceding number. So, missing term = (15 x 2) + 1 = 31.

Answer 2

: 3 , 7 , 15 , 47 , 63 , 127

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