Question 81

Find the wrong number in the given series.
7, 8, 12, 21, 37, 61, 98

Solution

Share

7, 8, 12, 21, 37, 61, 98

here the difference is squares of the no.

$$8-7 = 1^2 =1$$

$$12-8 = 2^2 =4$$

$$21-12 = 3^2 =9$$

$$37-21 = 4^2 =16$$

$$61-37 = 5^2 =25$$

$$98-61= 6^2 =36$$

so wrong term is 61

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