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
7
9
2
14
?
3
105
117
Answer: D. 12
In the first column, 2 x 1 + 1 = 3. In the second column, 14 x 7 + 7 = 105. Let the missing number in the third column be y. Then, y x 9 + 9 = 117 or 9y = 108 or y = 12.