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ECAT Pre General Science Mathematics Chapter 5 Matrics and Determinants Online Test MCQs With Answers
Question # 1
An equation of the form ax + by = k is homogeneous linear equation when:
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Question # 2
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Null matrix
Triangular matrix
Unit matrix
Rectangular matrix
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Question # 3
A matrix with a single column is called
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Column matrix
Row matrix
Identity matrix
Null matrix
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Question # 4
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1
-1
0
I
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Question # 5
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5
15
10
20
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Question # 6
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2 x 2
2 x 3
3 x 2
3 x 3
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Question # 7
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1, 2, 3
1, 5, 9
2, 5, 8
3, 6, 9
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Question # 8
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a = 4, b = 1
a = 1, b = -4
a = 0, b = 4
a = 2, b = 4
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Question # 9
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Question # 10
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3K
K2
K3
K
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Question # 11
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Symmetric
Skew-symmetric
Hermitian
Skew hermitian
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Question # 12
If A is a non singular matrix then A
-1
= ______
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Question # 13
A matrix with a single row is called a
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Column matrix
Row matrix
Null matrix
Identity matrix
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Question # 14
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Question # 15
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Question # 16
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all are correct
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Question # 17
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Question # 18
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Question # 19
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A(
α
) - A(
β
)
A(
α
) + A(
β
)
A(
α
-
β
)
A(
α
+
β
)
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Question # 20
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a = -1/2, b = -1
a = 1, b = 2
a = 2, b = 3
None of above
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Question # 21
If A = [aij]mxpand B =[aij]pxnthen order of BA is
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m x n
p x n
n x m
None of these
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Question # 22
If order of A is m x n, then order of A
t
is
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m x m
n x n
m x n
n x m
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Question # 23
The transpose of a zero matrix is a ______
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Column matrix
Zero matrix
Row matrix
Scalar matrix
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Question # 24
The transpose of a row matrix is a ______
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Zero matrix
Diagonal matrix
Column matrix
Row matrix
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Question # 25
For non-trival solution |A| is
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non zero
A = 0
|A| = 0
At = 0
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Question # 26
In order of A is m x n and order of B is n x p then order of AB is
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m x m
n x n
m x p
p x m
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Question # 27
Let A is a 3 x 3 matrix and B is its adjoint matrix. If |B| = 64, then |A| =
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Question # 28
A square matrix A for which A
t
= A is called a
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Column matrix
Symmetric matrix
Skew-symmetric matrix
Row matrix
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Question # 29
For non-trival solution |A| is
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A = 0
A
t
= 0
|A| = 0
None of these
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Question # 30
The number of non zero rows in echelon form of a matrix is called
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Order of matrix
Rank of matrix
Row operation
None of these
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