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Which of the following numbers will replace the question mark (?) in the given series?7, 13, 27, 53, 107, ?​​
Question

Which of the following numbers will replace the question mark (?) in the given series?
7, 13, 27, 53, 107, ?​​

A.

103

B.

113

C.

203

D.

213

Correct option is D

Given: 
7, 13, 27, 53, 107, ?​​
Logic: multiply by 2, alternately subtract and add 1
7 × 2 - 1 = 14 - 1 = 13
13 × 2 + 1 = 26 + 1 = 27
27 × 2 - 1 = 54 - 1 = 53
53 × 2 + 1 = 106 + 1 = 107
Apply to next term:
107 × 2 - 1 = 214 - 1 = 213

Thus, correct option is (d).

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