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 |
Option:
A. 15
B. 18
C. 19
D. 20
Answer: B . 18
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Justification:
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.
