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.
1
2
3
11
7
5
120
45
?
Answer: C. 16
In the first column, 112 - 12 = 121 - 1 = 120. In the second column, 72 - 22 = 49 - 4 = 45. .'. In the third column, missing number = 52 -32 = 25 - 9 = 16.