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# Matrices and Determinants MCQ

1. If the order of matrix A is m x p. And the order of B is p x n. Then the order of AB is ?
1. n x p
2. m x p
3. m x n
4. n x m

2. If A and B are matrices, then which from the following is true ?
1. A + B B + A
2. (At)t A
3. AB BA
4. all are true

3. What is a, if is a singular matrix ?
1. 5
2. 6
3. 7
4. 8

4. If then |A| = ?
1. 2
2. 3
3. 4
4. 5

5. If then order of matrix A = ?
1. 2 x 2
2. 2 x 3
3. 3 x 2
4. 3 x 3

6. The number of non-zero rows in an echlon form is called ?
1. reduced echlon form
2. rank of a matrix
3. conjugate of the matrix
4. cofactor of the matrix

7. (AB)t = ?
1. BtAt
2. AtBt
3. AB
4. BA

8. The matrix is a ?
1. symmetric
2. skew-symmetric
3. hermitian
4. skew-hermitian

9. If then |A| = ?
1. 30
2. 40
3. 50
4. 60

10. The matrix is a ?
1. scalar matrix
2. identity matrix
3. even matrix
4. odd matrix