Question # 1

In (x +iy) y is called as

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Imaginary part

Complex number

Real part

None of above

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The square root of 2i - 20i is

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±(5 - 2i)

±(5+ 2i)

(5 - 2i)

None of these

Every natural number is

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A prime number

An irrational number

An integer

An even number

The set of rational number is represented by

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W

R

Q'

Q

3/2 is

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An irrational number

Whole number

A positive integer

A rational number

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Principle of equality of fractions

Rule for product of fractions

Golden rule for fractions

Rule for quotient of fractions

In R, the additive inverse of a is

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0

1

-a

1/a

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202.04 is an example of

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Recurring decimals

Non-recurring decimals

Terminating decimals

None of above

In set builder notation the set {0,1,2,........100} can be written as

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{x / xε B ∧ x ≤ 100}

{x / x ∈ W ∧ x < 101}

{x / x ∈ Z ∧ x < 101}

The set of first 100 whole numbers

0.25 is ______

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An irrational number

A natural number

A prime number

A rational number

i =

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Any whole number can be written as a product of factors which are

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Even number

Odd numbers

Prime number

Rational number

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15

15 i

-15 i

-15

If in a set of real no a is additive identity then

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a+a = 2a

a+a = 1

a+a = 0

None of these

The multiplicative inverse of 2/3 is

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3/2

-2/3

-3/2

1

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Set of whole number

Rational Numbers

Complex numbers

Whole numbers

The square root of every incomplete square is an

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Rational numbers

Even numbers

odd numbers

Irrational numbers

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1

3

2-i

-1

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A positive integer

A negative integer

A natural number

An irrational number

The additive inverse of 2/3 is

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3/2

-2/3

-3/2

0

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-3 -2i

3 +2i

1 + 2i

1 - 2i

√2 +√3 +√5) = (√2 +√3 +√5: this property is called

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associative property w.r.t addition

commutative property

Closure property w.r.t addition

Additive identity

I is not

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Real number

Natural number

Prime Number

Whole Number

A prime number can be a factor of a square only if it occurs in the square at least

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Once

Thirce

Twice

None of these

If a is any real number and a = a is called

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symmetric property

Trichotomy Properties

Transitive Property

Reflexive Properties

If A = {x / x ∈ R ∧ x² - 16 = 0} then A =

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- x

Infinite set

Φ

{-4,4}

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Multiplication property

Additive property

Trichotomy property

Transitive property of inequality

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Rational

Irrational

Natural

Odd

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ECAT Pre General Science Mathematics Chapter 1 Number System Online Test MCQs With Answers

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