What should come in place of the question mark '?' in the following number series?
12, 6, 0, -6, ?, -18
Show answer & explanation
Correct answer: B
Explanation
The correct answer is option 2 i.e. -12.
Given series: 12, 6, 0, -6, ?, -18
12 - 6 = 6, 6 - 6 = 0, 0 - 6 = -6, -6 - 6 = -12, -12 - 6 = -18