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.
2
4
0
1
2
4
3
1
3
36
?
91
Answer: D. 73
Clearly, (1st row)2 + (2nd row)2 + (3rd row)2 = 4th row. So, in the first column, 22 + 13 + 33 = 8 + 1 + 27 = 36. In the third column, 03 + 43 + 33 = 0 + 64 + 27 = 91. .'. In the second column, missing number = 43 + 23 + 13 = 64 + 8 + 1 = 73.