Question # 1

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The set of complex numbers forms

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Commutative group w.r.t addition

Commutative group w.r.t multiplication

Commutative group w.r.t division

Non commutative group w.r.t addition

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The set {-1, 1} is closed under the binary operation of

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Addition

Multiplication

Subtraction

Division

The set of all positive even integers is

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Not a group

A group w.r.t subtraction

A group w.r.t division

A group w.r.t multiplication

Under multiplication, solution set of is

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Groupoid

Abelian group

Semi group

All of these

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

If A and B are two sets then intersection of A and B is denoted by

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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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A

A'

U

None of these

The set of complex numbers forms a group under the binary operation of

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Addition

Multiplication

Division

Subtraction

Power set of difference set N-W is

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Empty set

Infinite set

Singleton set

{0,∅}

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If the intersection of two sets is non-empty, but either is a subset of other are called

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Disjoint sets

Over lapping

Equal sets

None of these

For a set A, A∪Ac= ---------------------

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A

∅

Ac

U

A function in which the second elements of the order pairs are distinct is called

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Onto function

One-one function

Identity function

Inverse function

The multiplicative inverse of x such that x = 0 is

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-x

does not exist

1/x

0

The set {Z\{0}} is group w.r.t

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Addition

Multiplication

Division

Subtraction

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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ECAT Mathematics Chapter 23 MCQs With Answers

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