Select the number from among the given options that can replace the question mark (?) in the following series.
128, 109, ?, 77, 64, 53, 44
Show answer & explanation
Correct answer: C
Explanation
The correct answer is option 3 i.e. 92.
Given series: 128, 109, ?, 77, 64, 53, 44
The series follows this pattern:
128 - 19 = 109
109 - 17 = 92
92 - 15 = 77
77 - 13 = 64
64 - 11 = 53
53 - 9 = 44
So, the missing term in the series is 92.