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Answer : 3 75 Explanation : Answer: C) 75 Explanation: Here in the given series, it follows a pattern that 77 2 = 79 79  - 3 = 76 76 5 = 81 81 -  7 = 74 74 11 = 85 Consecutive adding and subtracting of prime numbers. So the wrong number in the given series is 75.

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