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.
BD3 CE5 DF15
EG2 FH4 GI8
HJ4 IK6 ?

Answer: A. JL24

The number in the third column in each row is ibtained by multiplying the numbers in the first and second column in thesame row. So,
In first row, 3 x 5 = 15 and in second row, 2 x 4 = 8.
.'. Number to be filled in blank space = 4 x 6 = 24. Only (a) contains 24.