Which of the following numbers will replace the question mark (?) in the given series?
1, 3, 6, ?, 20, 37
Show answer & explanation
Correct answer: B
Explanation
The correct answer is Option 2 i.e. 11.
Given series: 1, 3, 6, ?, 20, 37
The series follows this pattern:
1 × 2 + 1 = 3
3 × 2 + 0 = 6
6 × 2 + (-1) = 11
11 × 2 + (-2) = 20
20 × 2 + (-3) = 37
So, the missing term in the series is 11.