What will come in place of the question mark (?) in the following series?
18, 27, 49, 88, 148, ?

ATQ, the given series is: 18, 27, 49, 88, 148, ? Or, let us find the first-level differences: Or, 27 - 18 = 9 Or, 49 - 27 = 22 Or, 88 - 49 = 39 Or, 148 - 88 = 60 Or, let us find the second-level differences (difference of differences): Or, 22 - 9 = 13 Or, 39 - 22 = 17 Or, 60 - 39 = 21 So, the second-level differences are in an arithmetic progression with a common difference of 4 (13, 17, 21, ...) So, the next second-level difference must be 21 + 4 = 25 So, the next first-level difference must be 60 + 25 = 85 So, the missing term = 148 + 85 = 233 Hence, the correct answer is B.