Question # 1

Z is a group under

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Subtraction

Multiplication

Addition

None of these

If n(X) = 18, n(X∩Y) = 7, n(X∪ Y) = 40 then n(Y) =

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1

12

5

29

The set { {a, b} } is

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Infinite set

Singleton set

Two points set

Empty set

The graph of a quadratic function is

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Circle

Ellipse

Parabola

Hexagon

The statement that a group can have more than one identity elements is

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True

False

Fallacious

Some times true

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}

Power set of X i.e P(X)..........under the binary operation of union U

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Forms a group

Does not form a group

Has no identity element

Infinite set although X is infinite

G = {e, a, b, c} is an Abelian group with e as identity element The order of the other elements are

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2,2,2

3,3,3

2,2,4

2,3,4

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

Which conjunction is not true ?

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For any set B, BUB' is

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Is set B

Set B'

Universal set

None of these

The contra positive of p → q is

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q → p

~q→~q

~p→~q

None of these

if A = (x/x€ Q˄ 0 < x < 1}, the A is

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Infinite set

Finite set

Set of rational numbers

Set of real numbers

Every subset of a finite set is

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Disjoint

Null

Finite

Infinite

The many subset can be formed from the set {a,b,c,d}

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8

4

12

16

Let A and B be two sets. If every element of A is also an element of B then

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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

If a set S contains "n" elements then P (S) has ...... number of elements

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2ⁿ

2²ⁿ

2 . n

n²

The statement that a group can have more than one identity elements is

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True

False

Fallacious

Some times true

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Natural numbers

Whole numbers

Integers

Rational numbers

The set (Z, +) forms a group

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Forms a group w.r.t addition

Forms a group w.r.t multiplication

Non commutative group w.r.t multiplication

Doesn't form a group

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ECAT Mathematics Chapter 23 MCQs With Answers

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