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11th Class Part 1 Mathematics Chapter 3 Test Online MCQs With Answers
Question # 1
If two rows (or two columns) in a square matrix are identical (i.e. corresponding elements are equal), the value of the determinant is:
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0
1
-1
±1
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Question # 2
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ab - cd = 0
ac - bd = 0
ad - bc = 1
ad - bc = 0
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Question # 3
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diagonal matrix
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Question # 4
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diagonal matrix
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Question # 5
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 # 6
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40
-40
26
-26
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Question # 7
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scalar matrix
diagonalmatrix
lower triangularmatrix
upper triangularmatrix
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Question # 8
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 # 9
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zero
non-singular
singular
none of these
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Question # 10
A matrix in which each element is 0 is called:
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Question # 11
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 # 12
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2
-2
5
-5
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Question # 13
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25
20
40
2a + 2b + 2c
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