Find the missing number?

A. 7

B. 17

C. 5

D. 11

Answer: Option C

Solution(By Examveda Team)

Start with the row of 4 numbers in the centre of the diagram, and add adjacent pairs of numbers together, putting the results in the circles directly above. Repeat this pattern for the next row up. Next, calculate the difference between adjacent numbers in the middle row, putting the results in the circles directly below. Repeat this pattern for the next row down.