Question # 1

The set { {a, b} } is

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Infinite set

Singleton set

Two points set

Empty set

The set of even prime numbers is

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(2,4,6,8,10}

{2,4,6,8,10,12}

{1,3,5,7,9}

{2}

The multiplicative inverse of -1 in the set {1-, 1} is

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1

-1

0

Does not exist

The set {1, -1, 1, -1}, form a group under

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Addition

Multiplication

Subtraction

None

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

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A

∅

Ac

U

Every set is an improper subset of

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Empty set

Equivalent set

Itself

Singleton set

The identity elements with respect to subtraction is

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0

1

-1

Does not exist

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

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Addition

none of these

Division

Subtraction

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The contra positive of p → q is

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q → p

~q→~q

~p→~q

None of these

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

The number of proper subset of A ={a.b.c.d} is

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3

6

8

15

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A∪(A∪B)= --------------------

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B

A

A∪B

None of these

To each element of a group there corresponds ............. inverse element

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Two

One

No

Three

The set {-1,1} is

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Group under the multiplication

Group under addition

Does not form a group

Contains no identity element

{x|x∈R∧x≠x} is a

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Infinite set

Null set

Finite set

None of these

A = B iff

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All elements of A also the elements of B

A and B should be singleton

A and B have the same number of elements

If both have the same element

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A statement which is either true or false is called

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Induction

Deduction

Propositicon

Logic

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ECAT Mathematics Chapter 23 MCQs With Answers

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