Which of the following numbers will replace the question mark (?) in the given series?
18, 20, 43, 133,?
Show answer & explanation
Correct answer: B
Explanation
The correct answer is Option 2 i.e. 537.
Given series: 18, 20, 43, 133,?
The series follows this pattern:
18 × 1 + 2 = 18 + 2 = 20
20 × 2 + 3 = 40 + 3 = 43
43 × 3 + 4 = 129 + 4 = 133
133 × 4 + 5 = 532 + 5 = 537
So, the next term in the series is 537.