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Online Tests
11th Class FA Mathematics Chapter 3 Online Test MCQs With Answers
Question # 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:
Choose an answer
p×m
p×n
n×p
m×p
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Question # 2
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singular
non-singular
rectangular
null
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Question # 3
If A is a square matrix order 3 × 3 the |kA| equals:
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k |A|
k
2
|A|
k
3
|A|
k
4
|A|
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Question # 4
The order of a matrix is shown by:
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number of columns + number of rows
number of rows × number of columns
number of columns - number of rows
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Question # 5
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5
14
20
6
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Question # 6
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Question # 7
If A is a square matrix, then:
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|A
t
| = A
|A
t
| = -A
|A
t
| = |A|
A
t
= A
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Question # 8
The additive inverse of a matrix A is:
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A
A
-1
- A
A
2
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Question # 9
For a square matrix A, |A| equals:
Choose an answer
A
t
|A
t
|
-|A
t
|
-A
t
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Question # 10
A matrix of order m×1 is called:
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row matrix
column matrix
identity matrix
scalar matrix
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Question # 11
If each element of a 3 × 3 matrix A is multiplied by 3, then the determinant of the resulting matrix is:
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|A|
3
27|A|
3|A|
9|A|
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Question # 12
If AB = BA = I, then A and B are:
Choose an answer
equal to each other
multiplicative inverse of each other
additive inverse of each other
both singular
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Question # 13
A matrix in which each element is 0 is called:
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Question # 14
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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Question # 15
If A and B are two matrices, then:
Choose an answer
A B = O
AB = BA
AB = I
AB may not be defined
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Question # 16
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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Question # 17
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
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Question # 18
[0] is a:
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Question # 19
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scalar matrix
diagonalmatrix
lower triangularmatrix
upper triangularmatrix
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Question # 20
The trivial solution of the homogeneous linear equations is:
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(1, 0, 0)
(0, 1, 0)
(0, 0, 1)
(0, 0, 0)
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