Select the number from among the given options that can replace the question mark
(?) in the following series.
15, 45, 75, 105,?
Show answer & explanation
Correct answer: B
Explanation
The correct answer is option 2 i.e. 135.
Given series: 15, 45, 75, 105,?
The series follows this pattern:
15 + 30 = 45
45 + 30 = 75
75 + 30 = 105
105 + 30 = 135
So, the next term in the series is 135.