Mathematics MCQs Chapter 2 - PLS Prep by PakLearningSpot

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Created on January 19, 2022

Ch 2 Sets, Functions and Groups

1 / 37

The graph of linear function is :

parabola

Circle

straight line

triangle

2 / 37

Squaring a number is a:

binary operation

Function

Unary operation

relation

3 / 37

Every function is:

none of these

one to one

Relation

inverse function

4 / 37

The symbol which is used to denote negation of a proposition is

∧

∨

→

5 / 37

The number of all subsets of a set having three elements is:

6 / 37

An onto function is also called:

Injective

Bijective

Surjective

Inverse

7 / 37

The set of odd numbers between 1 and 9 are

{1,3,5,7,9}

{1,3,5,7}

{3,5,7,9}

{3,5,7}

8 / 37

Inverse of any element of a group is:

unique

none of these

Not unique

has many inverses

9 / 37

Inverse of a line is :

A line

a parabola

a point

not defined

10 / 37

A compound proposition which is always wrong is called:

contingency

contradiction

absurdity

Tautology

11 / 37

12 / 37

A set is a collection of objects which are

not defined

Well defined

identical

Well defined and distinct

13 / 37

. Truth set of a tautology is

False

True

Universal set

14 / 37

Which of the following is not a binary operation :

√

–

15 / 37

A compound proposition which is always neither true nor false is called:

Tautology

contradiction

contingency

absurdity

16 / 37

A compound proposition which is always true is called:

contingency

contradiction

absurdity

Tautology

17 / 37

A diagram which represents a set is called______

None

Argand

Venn’s

Plane

18 / 37

The number of all subsets of a set having three elements is:

19 / 37

A set is a collection of objects which are

Well defined and distinct

Well defined

not defined

identical

20 / 37

Every recurring non terminating decimal represents

None

?′

21 / 37

Squaring a number is a:

Function

binary operation

Unary operation

relation

22 / 37

A diagram which represents a set is called______

Argand

Venn’s

None

Plane

23 / 37

The graph of linear function is :

Circle

parabola

straight line

triangle

24 / 37

Total number of subsets that can be formed from the set {?, ?, ?} is

25 / 37

Which of the following is true:

all of these

? ⊂ ?

26 / 37

? − {?} is a group ?. ?. ? the binary operation

−

27 / 37

Every function is:

Relation

none of these

inverse function

one to one

28 / 37

In a proposition if ? → ? ???? ? → ? is called

None

converse of ? → ?

Inverse of ? → ?

contrapositive of ? → ?

29 / 37

If ? and ? are disjoint sets , then ? ∩ ? =

30 / 37

If ? ∈ ? ∪ ? then

? ∈ ? ?? ? ∉ ?

? ∉ ? ?? ? ∉ ?

? ∈ ? ?? ? ∈ ?

? ∉ ? ?? ? ∈ ?

31 / 37

Inverse of any element of a group is:

has many inverses

Not unique

unique

none of these

32 / 37

If ? ∈ ?′ = ? − ? then

? ∉ ? ??? ? ∉ ?

? ∉ ? ??? ? ∈ ?

? ∈ ? ??? ? ∉ ?

? ∈ ? ??? ? ∈ ?

33 / 37

The set of odd numbers between 1 and 9 are

{1,3,5,7,9}

{1,3,5,7}

{3,5,7}

{3,5,7,9}

34 / 37

Identity element in (?, . ) is:

(0,1)

(0,0)

(1,1)

(1,0)

35 / 37

? → ? is called converse of

? → ?

~? → ?

~??

? → ?

36 / 37

? ∪ ? = ? ∩ ? then ? is equal to

?′

37 / 37

If ? ⊆ ? then ?(? ∩ ?) =

?(?) + ?(?)

?(?)

?(?). ?(?)

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