15 questions

- 1. Multiple Choice
1. A matrix A is both symmetric and skew symmetric if A is

Null matrix

unit matrix

row matrix

none of these

- 2. Multiple Choice
If A and B are invertible matrix then (AB)

^{-1}=A

^{-1}B^{-1}AB

B

^{-1}A^{-1}none of these

- 3. Multiple Choice
If A is any invertible matrix then A is

square matrix

non singular matrix

both

none of these

- 4. Multiple Choice
1. Let A be a square matrix of order 3x3 then| kA| = .

k |A|

k

^{2}|A|k

^{3}|A|3k|A|

- 5. Multiple Choice
1. which of the following is correct

determinants is a square matrix

determinants is a number associated to a matrix

determinants is a number associated to a square matrix

none of these

- 6. Multiple Choice
If A is an invertible matrix of order 3 and |A|=5 then find |Adj A|

5

15

25

125

- 7. Multiple Choice
If A is square matrix of order 3 such that |AdjA| =64 , find |A|

64

8

4

192

- 8. Multiple Choice
If the order of matrix A is m×p. And the order of B is p×n. Then the order of matrix AB is

m × n

n × m

n × p

m × p

- 9. Multiple Choice
*When you multiply a matrix by the identity matrix, you obtain the*inverse matrix.

transpose matrix.

Identity matrix

original matrix.

- 10. Multiple Choice
*When you multiply a matrix by the inverse matrix, you obtain the*inverse matrix.

transpose matrix.

Identity matrix

original matrix.

- 11. Multiple Choice
Two matrices A and B are multiplied to get AB if

both are rectangular both have same order

no of columns of A is equal to columns of B

no of rows of A is equal to no of columns of B

no of columns of A is equal to no of rows of B

- 12. Multiple Choice
If |A| = 0, then A is

zero matrix

singular matrix

non-singular matrix

Identity matrix

- 13. Multiple Choice
2 and 1

-2 and -1

2 and -1

3 and 4

- 14. Multiple Choice
4

8

3

6

- 15. Multiple Choice
10

0

1

4

- Answer choicesTagsAnswer choicesTags