Which of the following numbers will replace the question mark (?) in the given series?
15, 27, 12, ?, 9, 33
Show answer & explanation
Correct answer: D
Explanation
The correct answer is Option 4 i.e. 30.
Given series: 15, 27, 12, ?, 9, 33
The series follows the pattern:
15, 12, 9
15 - 3 = 12
12 - 3 = 9
2. 27, ?, 33
27 + 3 = 30
30 + 3 = 33
So, the missing term in the series is 30.