Question # 1

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Natural numbers

Whole numbers

Integers

Rational numbers

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Addition

Subtraction

Multiplication

None of these

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

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Addition

Multiplication

Subtraction

Division

If a = {2m/2m < 9 ,m€ p} , the (n A) =

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{2,3,4,5,6,7,8}

{2,4,6,8............16}

{ 4, 6}

{2,3,5,7}

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}

If A = {2m/m³= 8 , m€ Z} then A =

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{1,8,27}

{4}

(2,4,6}

{2,16,54}

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

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1

-1

0

Does not exist

The function {f(x,y)|y = ax2 +bx +c} is

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One-one function

Constant function

Onto function

Quadratic function

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square root function

identity function

linear function

quadratic function

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

The number of subsets of B = {1,2,3,4,5}

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10

32

16

5

If p and q are two statements then their conjunction is denoted by

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{1, 2, 3} is _____

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an infinite set

A finite set

A singleton set

Universal set

If B-A≠φ , then n(B-A) is equal to

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n(a)+n(c)

n(c)-n(a)

n(a)-n(c)

None of these

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The set {x +iy / x, y ∈ Q} forms a group under the binary operation of

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Addition

Multiplication

Division

Both addition and multiplication

The function f{(x, y) | y = ax²+ bx + c} is

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One-one function

Constant function

Onto function

Quadratic function

(A∪B)∪C= --------------------------

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A∩B(B∪C)

A∪(B∪C)

A∪(B∩C)

None of these

If B ={x/x€ Z ^ - 3 < x < 6}, then n (B) =

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5

{-3,-2,-1,0,1,2,3,4,5,6}

8

9

The set of first elements of the ordered pairs in a relation is called its

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domain

range

relation

function

Every subset of a finite set is

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Disjoint

Null

Finite

Infinite

A - B = ______

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3

1

2

4

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

A conditional is regarded as false only when the antecedent is true and consequent is

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True

False

Known

Unknown

(A ∩ B)c =

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A∩ B

(A ∪ B)c

Ac∪Bc

Φ

Z is a

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Infinite set

Finite set

Singleton set

Set of all integers

If D = {a} , the P(D) =

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{a}

∅

{∅,{a}}

{∅,a}

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}

The contra positive of p → q is

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q → p

~q→~q

~p→~q

None of these

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