Question # 1

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

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True

False

Known

Unknown

The set of rational numbers is subset of

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The set of natural numbers

The set of real numbers

The set of integers

The set of whole numbers

If z1 = 2 + 6i and z2 = 3 + 7i then which expression defines the product of z1 and z2

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36 +(-32)i

-36+32i

6+(-11)i

0, +(-12)i

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

The set which has no proper subset is

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{0}

{}

{∅}

None of these

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}

If A ⊆ B then A ∪ B is

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A

B

A'

A ∩B

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Onto function is also called

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Binjective function

Injective function

Surjechive function

None of these

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

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Addition

Multiplication

Subtraction

Division

Identity w.r.t intersection in a power set of any set is

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∅

Set itself

Singleton set

{0}

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None of these

The function whose range consists of just one element is called

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One-One Function

Identity Function

Onto Function

Constant Function

{0} is a

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Empty set

Singleton set

Zero set

Null Set

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

If n(A) = n then n(P(A)) is

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2n

n²

n/2

2ⁿ

The set of natural is a semi group w.r.t

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Addition

Division

Subtraction

None of these

The set (Z,+) forms a group

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Forms a group w.r.t addition

Non commutative group w.r.t multiplication

Forms a group w.r.t multiplication

Doesn't form a group

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The total number of subsets that can be formed out of the set {a, b, c} is

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1

4

8

12

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

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True

False

Ambiguous

Some times true

Φ set is the _______ of all sets

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Subset

Union

Universal

Intersection

The set (Z, +) forms a group

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Forms a group w.r.t. addition

Non commutative group w.r.t. multiplication

Forms a group w.r.t multiplication

Doesn't form a group

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a-b=ab

ab=a

a+b=ab

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A

A'

U

U'

The number of subsets of a set having three elements is

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4

6

8

none of these

The graph of a quadratic function is

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Circle

Ellipse

Parabola

Hexagon

A function whose range is just one elements is called

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One-one function

Constant function

Onto function

Identity function

The set X is

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Proper Subset of X

Not A subset of X

Improper Subset of X

None of these

A function whose range is just one element is called

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One-one function

Constant function

Onto function

Identity function

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ECAT Pre General Science Mathematics Chapter 2 Set, Functions and Groups Online Test MCQs With Answers

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