Select the number from among the given options that can replace the question mark (?) in the following series.
12, 22, 40, 74, 140,?
Show answer & explanation
Correct answer: A
Explanation
The correct answer is Option 1. i.e. 270.
Given series: 12, 22, 40, 74, 140,?
The series follows this pattern:
12 × 2 - 2 = 24 - 2 = 22
22 × 2 - 4 = 44 - 4 = 40
40 × 2 - 6 = 80 - 6 = 74
74 × 2 - 8 = 148 - 8 = 140
140 × 2 - 10 = 280 - 10 = 270
So, the next term in the series is 270.