Question # 1

If A and B are two matrices, then:

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A B = O

AB = BA

AB = I

AB may not be defined

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3×1

1×3

3×3

1×1

If A is a matrix of order m × n and B is a matrix of order n × p then the order of AB is:

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p×m

p×n

n×p

m×p

If any two rows of a square matrix are interchanged, the determinant of the resulting matrix:

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is zero

is multiplicative inverse of the determinant of the original matrix

is additive inverse of the determinant the original matrix

none of these

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2

-2

5

-5

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diagonal matrix

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40

-40

26

-26

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scalar matrix

diagonalmatrix

lower triangularmatrix

upper triangularmatrix

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9

-9

-6

none

If A is a square matrix, then:

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|A^t| = A

|A^t| = -A

|A^t| = |A|

A^t= A

If each element in any row or each element in any column of a square matrix is zero, then value of the determinant is:

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0

1

-1

none of these

If A = [a_ij], B = [b_ij] and AB = 0 then:

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A = 0

B = 0

either A = 0 or B = 0

A & B not necessarily zero

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zero

non-singular

singular

none of these

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11th Class FSC Mathematics Chapter 3 Test Online MCQs With Answers

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