Series Completion

Directions to SolveChoose the correct alternative that will continue the same pattern and replace the question mark in the given series.

3, 7, 15, ?, 63, 127

A 30

B 31

C 47

D 52

ANS:B - 31

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

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