Answer : 1 86 Explanation : Answer: A) 86 Explanation: Here the given number series is 5 11 21 44 ? 175 Now the given series follows a pattern, that x2 1, x2 - 1, x2 2, x2 - 2, x2 3, x2 - 3,... Then the missing number is x2 - 2 = 44 x 2 - 2 = 88 - 2 = 86 Hence, the missing number in the number series is 86.

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