3, 15, ?, 63, 99, 143 Options: A . &nbsp27 B . &nbsp35 C . &nbsp45 D . &nbsp56

3, 15, ?, 63, 99, 143

Question

3, 15, ?, 63, 99, 143

Options:

A . 27

B . 35

C . 45

D . 56

Answer: Option B
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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