STQC-NIELIT SC-B 2021

Question 3

In each of the following questions, one number is wrong in the series. Find out the wrong number –
3, 5, 12, 39, 154, 772, 4634:

Question 3 Explanation:

II number is 3*1+2 =5
III number is 5*2+2=12
IV number is 12*3+2=38
V number is 38*4+2=154
VI number is 154*5+2-772
So wrong number is 39

Correct Answer: C

Question 3 Explanation:

II number is 3*1+2 =5
III number is 5*2+2=12
IV number is 12*3+2=38
V number is 38*4+2=154
VI number is 154*5+2-772
So wrong number is 39