Which number will replace the question mark (?) in the following series?
168, 160, ?, 138, 124, 108
Show answer & explanation
Correct answer: D
Explanation
The correct answer is option 4 i.e. 150.
Given series: 168, 160, ?, 138, 124, 108
168 - 8 = 160, 160 - 10 = 150, 150 - 12 = 138, 138 - 14 = 124, 124 - 16 = 108