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.
| 6 | 9 | 15 |
| 8 | 12 | 20 |
| 4 | 6 | ? |
Option:
A. 5
B. 10
C. 15
D. 21
Answer: B . 10
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Justification:
In the first row, 6 x 3/2 = 9, 6 x 5/2 = 15.
In the second row, 8 x 3/2 = 9, 8 x 5/2 = 20.
.'. In the third row, missing number = 4 x 5/2 = 10.
