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11th Class Part 1 Mathematics Chapter 3 Test Online MCQs With Answers
Question # 1
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scalarmatrix
diagonalmatrix
lower triangularmatrix
uppertriangularmatrix
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Question # 2
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3×1
1×3
3×3
1×1
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Question # 3
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
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Question # 4
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diagonal matrix
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Question # 5
If A is non singular matrix then A
t
is:
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singular
nonsingular
symmetric
none
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Question # 6
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 # 7
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 # 8
A matrix in which each element is 0 is called:
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Question # 9
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zero
non-singular
singular
none of these
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Question # 10
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1
-1
-6
6
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Question # 11
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3×3
3×2
2×1
2×3
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Question # 12
Two matrices X and Y are equal if and only if:
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X and Y are of same order
Their corresponding elements are equal
Both a and b
None of these
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Question # 13
If A = [aij] and B = [bij] are two matrices of same order r × s, then order of A - B is:
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r - s
r × s
r + s
none of these
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Question # 14
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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Question # 15
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5
14
20
6
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Question # 16
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Question # 17
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3×2
2×3
2×2
3×3
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Question # 18
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
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Question # 19
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3
-3
1/3
-1/3
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Question # 20
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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Question # 21
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40
-40
26
-26
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