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.
| 7 | 4 | 5 |
| 8 | 7 | 6 |
| 3 | 3 | ? |
| 29 | 19 | 31 |
Option:
A. 3
B. 4
C. 5
D. 6
Answer: C . 5
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Justification:
In the first column, 29 - 8 = 7 x 3 = 21.
In the second column, 19 - 7 = 4 x 3 = 12.
Let the missing number in the third column be y.
Then, 31 - 6 = 5 x y or 5y = 25 or y = 5.
