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 set of odd numbers between 1 and 9 are

{3,5,7}

{1,3,5,7,9}

{3,5,7,9}

{1,3,5,7}

2 / 37

A compound proposition which is always true is called:

contradiction

Tautology

absurdity

contingency

3 / 37

Inverse of any element of a group is:

none of these

unique

has many inverses

Not unique

4 / 37

A set is a collection of objects which are

Well defined

identical

Well defined and distinct

not defined

5 / 37

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

∨

∧

→

6 / 37

A diagram which represents a set is called______

Venn’s

Argand

Plane

None

7 / 37

. Truth set of a tautology is

Universal set

True

False

8 / 37

A compound proposition which is always wrong is called:

contingency

Tautology

absurdity

contradiction

9 / 37

Inverse of a line is :

a point

not defined

A line

a parabola

10 / 37

11 / 37

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

contradiction

contingency

Tautology

absurdity

12 / 37

The graph of linear function is :

triangle

Circle

straight line

parabola

13 / 37

An onto function is also called:

Inverse

Bijective

Injective

Surjective

14 / 37

Squaring a number is a:

Function

binary operation

relation

Unary operation

15 / 37

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

16 / 37

Which of the following is not a binary operation :

–

√

17 / 37

Every function is:

Relation

one to one

none of these

inverse function

18 / 37

Inverse of any element of a group is:

has many inverses

none of these

Not unique

unique

19 / 37

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

None

converse of ? → ?

Inverse of ? → ?

contrapositive of ? → ?

20 / 37

Identity element in (?, . ) is:

(1,0)

(0,0)

(0,1)

(1,1)

21 / 37

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

22 / 37

The set of odd numbers between 1 and 9 are

{1,3,5,7}

{3,5,7}

{3,5,7,9}

{1,3,5,7,9}

23 / 37

? ∪ ? = ? ∩ ? then ? is equal to

?′

24 / 37

If ? ⊆ ? then ?(? ∩ ?) =

?(?) + ?(?)

?(?)

?(?). ?(?)

25 / 37

The graph of linear function is :

Circle

parabola

straight line

triangle

26 / 37

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

−

27 / 37

If ? ∈ ?′ = ? − ? then

? ∉ ? ??? ? ∉ ?

? ∈ ? ??? ? ∉ ?

? ∉ ? ??? ? ∈ ?

? ∈ ? ??? ? ∈ ?

28 / 37

A set is a collection of objects which are

not defined

Well defined

identical

Well defined and distinct

29 / 37

Which of the following is true:

? ⊂ ?

all of these

? ⊂ ?

30 / 37

? → ? is called converse of

? → ?

~??

? → ?

~? → ?

31 / 37

A diagram which represents a set is called______

Venn’s

Plane

None

Argand

32 / 37

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

33 / 37

Squaring a number is a:

binary operation

Function

Unary operation

relation

34 / 37

If ? ∈ ? ∪ ? then

? ∈ ? ?? ? ∉ ?

? ∉ ? ?? ? ∈ ?

? ∉ ? ?? ? ∉ ?

? ∈ ? ?? ? ∈ ?

35 / 37

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

36 / 37

Every function is:

none of these

Relation

inverse function

one to one

37 / 37

Every recurring non terminating decimal represents

None

?′

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