Find the missing number?

A. 3

B. 7

C. 14

D. 11

Answer: Option D

Solution(By Examveda Team)

Working through the diagram in columns, the value at the bottom of each column equals the sum of the top 2 numbers, minus the sum of the next 2 numbers. So,

(3 + 21) - (4 + 9) = x
24 - 13 = x
x = 11.