What should come in place of the question mark '?' in the following number series?
45, 40, 50, ?, 55, 30
Show answer & explanation
Correct answer: A
Explanation
The correct answer is option 1 i.e. 35.
Given series: 45, 40, 50, ?, 55, 30
I. 45 + 5 = 50, 50 + 5 = 55
II. 40 - 5 = 35, 35 - 5 = 30