Select the number from among the given options that can replace the question mark (?) in the following series.
72, 66, 63, 57, 54, 48,?
Show answer & explanation
Correct answer: D
Explanation
The correct answer is option 4 i.e. 45.
The series follows this pattern:
72 - 6 = 66, 66 - 3 = 63, 63 - 6 = 57, 57 - 3 = 54, 54 - 6 = 48, 48 - 3 = 45