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.
18 24 32
12 14 16
3 ? 4
72 112 128

Answer: B. 3

In the first column,  12 x 6 = 72 ;   18 ÷ 6 = 3.
In the third column,  16 x 8 = 128 ;   32 ÷ 8 = 4.
In the second column,  14 x 8 = 112.
So, missing number = 24 ÷ 8 = 3.