Question # 1

If the matrices A & B have the orders 2×3 and 5×2 then order BA is:

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3×5

5×2

2×2

none

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25

20

40

2a + 2b + 2c

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3×2

2×3

2×2

3×3

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9

-9

-6

none

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3

-3

1/3

-1/3

Minors and co-factors of the elements in a determinant are equal in magnitude but they may differ in:

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order

position

sign

symmetry

If A is a square matrix, then:

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|A^t| = A

|A^t| = -A

|A^t| = |A|

A^t= A

[0] is a:

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ab - cd = 0

ac - bd = 0

ad - bc = 1

ad - bc = 0

A matrix of order m×1 is called:

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row matrix

column matrix

identity matrix

scalar matrix

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40

-40

26

-26

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

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5

-5

-4

4

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scalar matrix

diagonalmatrix

triangularmatrix

none of these

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scalar matrix

diagonalmatrix

lower triangularmatrix

upper triangularmatrix

If a matrix A is symmetric as well as skew symmetric, then:

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A is null matrix

A is unit matrix

A is triangular matrix

A is diagonal matrix

If AB = BA = I, then A and B are:

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equal to each other

multiplicative inverse of each other

additive inverse of each other

both singular

For a square matrix A, |A| equals:

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A^t

|A^t|

-|A^t|

-A^t

If A is a matrix of order m × n, then the number of elements in each row of A is:

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m

n

m + n

m - n

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Mathematics Fsc Part 1 Chapter 3 Online Test MCQs With Answers

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