Find the missing number?

A. 7

B. 2

C. 13

D. 5

Answer: Option B

Solution(By Examveda Team)

Starting with the 10 at the top, one set of numbers increases by 3 each time, written in alternate boxes as you move down the diagram, and the other set of numbers decreases by 2, written in the boxes remaining. So,

Required Number = 4 - 2 = 2