Find the missing number?

A. 4

B. 6

C. 8

D. 12

Answer: Option B

Solution(By Examveda Team)

Working from top to bottom, and reading each pair of boxes as a 2 digit number, add 10 to the first number to give the next one down, then add 15, and 20 to complete the sequence. So,

Missing Number = 46 + 20 = 66.
Thus,
Missing Digit = 6.