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ECAT Mathematics Chapter 23 MCQs With Answers
Question # 1
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Addition
Multiplication
Division
Both addition and multiplication
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Question # 2
The many subset can be formed from the set {a,b,c,d}
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8
4
12
16
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Question # 3
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Natural numbers
Whole numbers
Integers
Rational numbers
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Question # 4
The multiplicative inverse of x such that x = 0 is
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-x
Does not exist
1/x
±1
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Question # 5
The set Q
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Forms a group under addition
Does not form a group
Contains no additive indentity
Contains no additive inverse
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Question # 6
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Evert element of A is in B
Every element of B is in A
Every element of A is in B'
Every element of A is in A
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Question # 7
The set of the first elements of the ordered pairs forming a relation is called its
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Function on B
Range
Domain
A into B
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Question # 8
The set of rational numbers is subset of
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The set of natural numbers
The set of real numbers
The set of integers
The set of whole numbers
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Question # 9
If p and q are two statements then their biconditional 'p if q' is denoted by
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Question # 10
Which of the following sets is finite
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The set of natural numbers between 3 and 10
The set of rational numbers between 3 and 10
The set of real numbers between 0 and 1
The set of rational numbers between 0 and 1
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Question # 11
The number of proper subset of A ={a.b.c.d} is
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3
6
8
15
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Question # 12
The set {1, -1, i, -i}
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Form a group w.r.t addition
Form a group w.r.t multiplication
Does not form a group w.r.t multiplication
Not closed under multiplication
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Question # 13
A = B iff
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All elements of A also the elements of B
A and B should be singleton
A and B have the same number of elements
If both have the same element
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Question # 14
For a set A, A∪Ac= ---------------------
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A
∅
Ac
U
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Question # 15
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1
12
5
29
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Question # 16
Power set of X i.e P(X)..........under the binary operation of union U
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Forms a group
Does not form a group
Has no identity element
Infinite set although X is infinite
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Question # 17
The set {x +iy / x, y ∈ Q} forms a group under the binary operation of
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Addition
Multiplication
Division
Both addition and multiplication
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Question # 18
The set { {a, b} } is
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Infinite set
Singleton set
Two points set
Empty set
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Question # 19
If a 1-1 correspondence can be established b/w two sets A and B, then they are called
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Equal sets
Equivalent sets
Over lapping sets
None of these
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Question # 20
The set of natural numbers is a subset of
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{1, 2, 3, .... 100}
The set of whole numbers
{2, 4, 6, 8, .....}
None of these
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Question # 21
Multiplicative inverse of "1" is
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0
-1
1
{0, 1}
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