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Online Tests
ECAT Pre General Science Mathematics Chapter 2 Set, Functions and Groups Online Test MCQs With Answers
Question # 1
The total number of subsets that can be formed out of the set {a, b, c} is
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1
4
8
12
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Question # 2
If n(X) = 18, n(X∩Y) = 7, n(X∪ Y) = 40 then n(Y) =
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1
12
5
29
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Question # 3
{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 # 4
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 # 5
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 # 6
Onto function is also called
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Binjective function
Injective function
Surjechive function
None of these
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Question # 7
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Addition
Subtraction
Multiplication
None of these
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Question # 8
If A is a set then any subset R of A x A is called
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relation on A
relation on B
relation from A to B
relation from B to A
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Question # 9
The set of integer is
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Finite group
A group w.r.t addition
A group w.r.t multiplication
Not a group
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Question # 10
The identity elements with respect to subtraction is
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0
1
-1
Does not exist
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Question # 11
If f:A→B is an injective function and second elements of no two of its ordered pairs are equal, then f is called
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1-1 and onto
Bijective
1-1 and into
None of these
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Question # 12
Multiplicative inverse of "1" is
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0
-1
1
{0, 1}
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Question # 13
A∪(A∪B)= --------------------
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B
A
A∪B
None of these
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Question # 14
If #n = (n-5)
2
+ 5, then find #3 x #4.
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54
12
4
9
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Question # 15
The function {f(x,y)|y = ax2 +bx +c} is
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One-one function
Constant function
Onto function
Quadratic function
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Question # 16
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n(A)
n(B)
0
1
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Question # 17
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 # 18
The set of the first elements of the orders pairs forming a relations is called its
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Relation in B
Range
Domain
Relation in A
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Question # 19
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Question # 20
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a constant function
linear function
quadratic funtion
none of these
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Question # 21
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 # 22
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 # 23
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Biconditional
Implication
Antecedent
Hypothesis
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Question # 24
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A
B
U
None of these
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Question # 25
Which of the following sets in infinite
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The set of students of your class
The set of all schools in Pakistan
The set of natural numbers between 3 and 10
The set of rational numbers between 3 and 10
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Question # 26
The set of integers is a subset of
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The set of natural numbers
The set of whole numbers
The set of prime numbers
The set of rational numbers
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Question # 27
If A = {x/x is a positive integer and 4≤x<23}, then A=
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{1,2,3,4,5,6,7}
{4,5,6...........22}
{1,2,3,.........23}
{1,2,3,4,5}
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Question # 28
The function whose range consists of just one element is called
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One-One Function
Identity Function
Onto Function
Constant Function
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Question # 29
The set of integer is
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Finite group
A group w.r.t addition
A group w.r.t multiplication
Not a group
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Question # 30
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 # 31
Group of none-singular matrices under multiplication is
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None-Abelian group
Semi group
Abelian group
None of these
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