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What will come in place of the question mark (?) in the following number series? 18, 29, 42, 53, ?,77

66
64
71
65

Correct Answer: 66

Explanation:

Given number series - 18, 29, 42, 53, ?, 77

The pattern is as follows - 18 + 11 = 29 29 + 13 = 42

42 + 11 = 53

53 + 13 = 66

66 + 11 = 77

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