In the following question, a matrix of certain characters is given. These characters follow a certain trend, row-wise or column-wise. Find out this trend and choose the missing character accordingly.
7
4
5
8
7
6
3
3
?
29
19
31
Answer: C. 5
In the first column, 29 - 8 = 7 x 3 = 21. In the second column, 19 - 7 = 4 x 3 = 12. Let the missing number in the third column be y. Then, 31 - 6 = 5 x y or 5y = 25 or y = 5.