Which number will replace the question mark (?) in the following series?
68, 67, ?, 65, 72, 63
Show answer & explanation
Correct answer: D
Explanation
The correct answer is option 4 i.e. 70.
Given series: 68, 67, ?, 65, 72, 63
Alternate series:
I. 67 - 2 = 65, 65 - 2 = 63
II. 68 + 2 = 70, 70 + 2 = 72