Which of the following numbers will replace the question mark (?) in the given series?
9, ?, 33, 50, 69, 92, 121
Show answer & explanation
Correct answer: B
Explanation
The correct answer is Option 2 i.e. 20.
Given series: 9, ?, 33, 50, 69, 92, 121
The series follows this pattern:
9 + 11 = 20
20 + 13 = 33
33 + 17 = 50
50 + 19 = 69
69 + 23 = 92
92 + 29 = 121
So, the missing term in the series is 20.