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.
6
9
15
8
12
20
4
6
?
Answer: B. 10
In the first row, 6 x 3/2 = 9, 6 x 5/2 = 15. In the second row, 8 x 3/2 = 9, 8 x 5/2 = 20.
.'. In the third row, missing number = 4 x 5/2 = 10.