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.
3
15
4
7
38
5
3
?
5
Answer: B. 18
In the first row, 3 x 4 + 3 = 15. In the second row, 7 x 5 + 3 = 38. .'. In the third row, missing number = 3 x 5 + 3 = 18.