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.
| 13 | 54 | ? |
| 7 | 45 | 32 |
| 27 | 144 | 68 |
Option:
A. 42
B. 36
C. 6
D. 4
Answer: D . 4
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Justification:
In the first column, 13 + 7 x 2 = 27.
In the second column, 54 + 45 x 2 = 144.
Let the missing number in the third column be y.
Then, y + 32 x 2 = 68 or y = 68 - 64 = 4.
