Matrices - I

1.    Which of the given values of x and y make the following pairs of matrices equal?

• Not possible to find

The number of all possible matrices of order 2×2 with each entry  1,2 or 3 is :

• 12

• 64

• 81

• 7

Identify the matrix

• Scalar Matrix

• Diagonal Matrix

• Unit Matrix

• Square Matrix

If the number of elements of a matrix represents a prime Number (p), then the number of matrices possible is

• 1

• p

• 2

• None of these

State True or false : Matrix addition is associative as well as commutative.

• True

• False

Identify The matrix

• Identity

• Scalar

• Diagonal Matrix

• Row Matrix

If A and B are two matrices of the order 3 × m and 3 × n, respectively, and m = n, then the order of matrix    (5A – 2B) is

• m × 3

• 3 × 3

• m × n

• 3 × n

If a matrix as 18 elements, then number of possible orders are

• 6

• 4

• 8

• 7

The sum of values on the main diagonal of A is equal to

• 6

• 7

• 16

• 3

• unit Matrix

• Null Matrix

• Scalar Matrix

• Diagonal Matrix