In this pyramid number if: 11 22 31 : 12 21 32 :: 9 12 21 : ?

A. 2 7 14

B. 8 13 20

C. 6 15 18

D. 10 23 30

Answer: Option B

Solution(By Examveda Team)

If we see diagonally we will get 11 22 31 and the next diagonal series is 12 21 32. Similarly the next diagonal series after 9 12 21 is 8 13 20.