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Series Completion

Directions to SolveChoose the correct alternative that will continue the same pattern and replace the question mark in the given series.
Q1:

3, 15, ?, 63, 99, 143

A 27

B 35

C 45

D 56

ANS:B - 35

Explanation: The terms of the given series are (22 - 1), (42 - 1),....., (82 - 1), (102 - 1), (122 - 1). So, missing term = (62 - 1) - (36 - 1) = 35.



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