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ECAT Mathematics Chapter 23 MCQs With Answers
Question # 1
The multiplicative inverse of x such that x = 0 is
Choose an answer
-x
does not exist
1/x
0
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Question # 2
Power set of X i.e P(X) _______ under the binary operation of union U
Choose an answer
Forms a group
Does not form a group
Has no identity element
Infinite set although X is infinite
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Question # 3
The total number of subsets that can be formed out of the set {a, b, c} is
Choose an answer
1
4
8
12
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Question # 4
The geometrical representation of a linear function is
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Circle
Parabola
Straight lie
None of these
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Question # 5
The set R is ______ w.r.t subtraction
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Not a group
A group
No conclusion drawn
Non commutative group
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Question # 6
The set of complex numbers forms a group under the binary operation of
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Addition
none of these
Division
Subtraction
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Question # 7
If there is one-one correspondence between A and B, then we write.
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A = B
A⊆ B
A⊇ B
A ∼ B
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Question # 8
Let A and B be two sets. If every element of A is also an element of B then
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Question # 9
The set of first elements of the ordered pairs in a relation is called its
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domain
range
relation
function
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Question # 10
A conditional is regarded as false only when the antecedent is true and consequent is
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True
False
Known
Unknown
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Question # 11
Choose an answer
Singleton set
A set with two points
Empty set
None of these
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Question # 12
Φ set is the _______ of all sets
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Subset
Union
Universal
Intersection
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Question # 13
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Question # 14
The set of complex numbers forms
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Commutative group w.r.t addition
Commutative group w.r.t multiplication
Commutative group w.r.t division
Non commutative group w.r.t addition
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Question # 15
Choose an answer
none of these
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Question # 16
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A = C
A = B
B = C
None of these
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Question # 17
The set { {a, b} } is
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Infinite set
Singleton set
Two points set
Empty set
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Question # 18
What is the number of elements of the power set of {0, 1}
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1
2
3
4
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Question # 19
If p and q are two statements then their biconditional 'p if q' is denoted by
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Question # 20
The graph of a quadratic function is
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Circle
Ellipse
Parabola
Hexagon
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Question # 21
The multiplicative inverse of -1 in the set {1-, 1} is
Choose an answer
1
-1
0
Does not exist
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