Question

Select the right number which should come in place of the question mark (?) in the series of numbers given below.
171, 162, 144, 135, __?

• A. 135
• B. 153
• C. 162
• D. 171

Hint:

Look for alternating differences in a number series for an easy solution.

Answer 1

The Correct Option is B

The series follows a pattern of subtraction: 171 - 9 = 162, 162 - 18 = 144, 144 - 9 = 135, Therefore, 135 - 18 = 153.