Question 45

Insert the missing number
16,33,65,131,261, (.........)

Solution

Share

The series is formed by the odd terms being multiplied by 2n + 1 and the even terms being multiplied by 2n - 1. Since 261 is the fifth term (odd term), it is multiplied by 2n + 1. So, the answer is A.

Was this solution helpful?

Get AI Help

Create a FREE account and get:

  • Download RRB Study Material PDF
  • 45+ RRB previous papers with solutions PDF
  • 300+ Online RRB Tests for Free

Join CAT 2026 course by 5-Time CAT 100%iler

Start your IIM journey with the right preparation and crack CAT 2026.

Enroll Now
Ask AI