Which of the following numbers will replace the question mark (?) in the given series?
52, 69, 86, 103, ?, 137

Correct option is B

Given: 52, 69, 86, 103, ?, 137
Logic: Series is increasing as 17 each time.
The difference between consecutive terms is:
69−52=17
86−69=17
103−86=17
So, the pattern shows that each number increases by 17.
Next, calculate the missing term:
103+17=120
Finally, verify the pattern:
137−120=17 (which fits the pattern)
So, number that will replace the question mark is 120.
Correct answer is (b) 120.