Matrix

Total number of possible matrices of order 3x3 with each entry 2 or 5 is

• 9

• 27

• 81

• 512

If A and B are square matrices of the same order then (A+B)(A-B) is equal to

• A²-B²

• A²-BA-AB-B²

• A²-B²+BA-AB

• A²-BA+B²+AB

If A and B are matrices of same order then AB' - BA' is a

• Skew symmetric matrix

• null matrix

• Symmetric matrix

• Unit matrix

If A is a matrix of order mxn and B is a matrix such that AB' and BA' are both defined the order of matrix B is

• mxm

• nxn

• nxm

• mxn

• 2I

• 3I

• I

• 5I

• -1

• 8

• 11

• 3

• Only AB is defined

• Only BA is defined

• AB and BA are both defined

• AB and B A both are not defined

• 0

• 8

• -7

• 1

A matrix has 24 elements.Possible number of orders of the matrix are

• 6

• 8

• 4

• 10

• -6,-12,-18

• -6,4,9

• -6,-4,-9

• -6,12,18