Which of the following numbers will replace the question mark (?) in the given series?
5, 31, 161, 811,?
Show answer & explanation
Correct answer: C
Explanation
The correct answer is Option 3 i.e. 4061.
Given series: 5, 31, 161, 811,?
The series follows this pattern:
5 × 5 + 6 = 25 + 6 = 31
31 × 5 + 6 = 155 + 6 = 161
161 × 5+ 6 = 805 + 6 = 811
811 × 5 + 6 = 4055 + 6 = 4061
So, the next term in the series is 4061.