Consider the following matrix. What is the number at 'X' in the matrix ?

Options

A. a. 5
B. b. 8
C. c. 9
D. d. 11

Answer

C

Explanation

The sum of the digits of the number in the middle column equals the sum of the numbers in the column to its left and right. So, in the first row we have 3+ 7 + 0 = 10 = 3+ 7 In the second row we have 2 + 2 + 4 = 2 + 6. Thus, in the third row the total of the left and right columns must be equal to 7 + 3 + 0 = 10. Which means that the number in the right column must be equal to 10 - 1 = 9.