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ECAT Pre General Science Mathematics Chapter 2 Set, Functions and Groups Online Test MCQs With Answers
Question # 1
(A ∩ B)c =
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A∩ B
(A ∪ B)c
Ac∪Bc
Φ
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Question # 2
A monoid (G, *) is said to be group if
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have identity element
is commutative
have inverse of each element
None of these
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Question # 3
The set of real numbers is a subset of
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The set of natural numbers
The set of rational numbers
The set of integers
The set of complex numbers
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Question # 4
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 # 5
Given X.Y are any two sets such that number of elements in X = 18, number of elements in set Y = 24,and number of elements in set X∪ Y =40,then number of elements in set x∩ Y =
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3
1
2
4
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Question # 6
If A = {2m/m
3
= 8 , m€ Z} then A =
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{1,8,27}
{4}
(2,4,6}
{2,16,54}
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Question # 7
For any set B, BUB' is
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Is set B
Set B'
Universal set
None of these
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Question # 8
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 # 9
For a set A, A∪Ac= ---------------------
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A
∅
Ac
U
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Question # 10
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 # 11
The negation of a number
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a relation
a function
unary operation
binary operation
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Question # 12
Choose an answer
A
A'
U
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Question # 13
Choose an answer
4
3
2
1
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Question # 14
If A⊆ B, and B is a finite set, then
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n (a) < n(B)
n(B)<(A)
n(A)≤ n (B)
n(A)≥ n(B)
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Question # 15
The graph of a quadratic function is
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Circle
Ellipse
Parabola
Hexagon
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Question # 16
The set {-1, 1} is closed under the binary operation of
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Addition
Multiplication
Subtraction
Division
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Question # 17
A set having only one element is called
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An empty set
Universal set
A singleton set
A power set
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Question # 18
The set {x|x∈N∧x-4=0} in tabular form is
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{-4}
{0}
{}
None of these
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Question # 19
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None of these
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Question # 20
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A = C
A = B
B = C
None of these
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Question # 21
The set (Z, +) forms a group
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Forms a group w.r.t. addition
Non commutative group w.r.t. multiplication
Forms a group w.r.t multiplication
Doesn't form a group
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Question # 22
The set X is
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Proper Subset of X
Not A subset of X
Improper Subset of X
None of these
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Question # 23
For any set B,B∪B' is
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Is set B
Set B'
Universal set
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Question # 24
If A ⊆ B then A ∪ B is
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A
B
A'
A ∩B
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Question # 25
The multiplicative inverse of -1 in the set {1-,1} is
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1
-1
±1
0
Does not exist
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Question # 26
If A∩B=B, then n(A∩B) is equal to
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n(a)
n(a)+n(c)
n(c)
None of these
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Question # 27
The set {{a,b}} is
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Infinite set
Singleton set
Two points set
None
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Question # 28
{x|x∈R∧x≠x} is a
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Infinite set
Null set
Finite set
None of these
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Question # 29
G = {e, a, b, c} is an Abelian group with e as identity element. The order of the other elements are
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2, 2, 2
3, 3, 3
2, 2, 4
2, 3, 4
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Question # 30
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Question # 31
Choose an answer
A
A'
U
None of these
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