Question # 1

Every whole number is

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A real number

An irrational number

A prime number

A negative integer

a >b ⇒a +c >b +c is known as

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Trichotomy property

Additive property of inequality

Transitive property

Multiplicative property

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Commutative law of addition

Associative law of addition

Additive identity

Additive inverse

1.4142135... is ______

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A natural number

A rational number

A prime number

An irrational number

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The multiplicative inverse of 4 is

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-4

-1/4

1/4

1

if Z1 = 1+i, Z2= 2+3i, then |Z2 -Z1| =

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√3 i

√7

-2-i

√5

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Associative law of multiplication

Commutative law of addition

Commutative law of multiplication

Associative law of addition

The value of x and y when (x + iy)2 = 5 - 4i

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x = 2, y = -1

x = -2, y = 1

x = 2, y = -i

x = 2, y = 2

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∀a,b,c∈R and c>0,then

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a>b ⇒ ac < bc

a>b ⇒ ac > bc

a<b ⇒ ac > bc

None of these

The multiplicative inverse of 2/3 is

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3/2

-2/3

-3/2

1

Which of the following sets has closure property w.r.t. addition

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{ 0 }

{ 1 }

{ 0, -1}

{ 1, -1}

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x

y

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

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If z₁= 2 + 6i and z₂= 3 + 7i, then which expression defines the product of z₁and z₂?

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36 + (-32)i

-36 + 32i

6 + (-11)1

0, +(-12)i

What is the conjugate of -6 -i?

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-6 +i

6+i

-6 -i

6 -i

If Z₁= 1 + i, Z₂= 2+3i, then |Z₂- Z₁| = ?

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14 is not a

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Prime number

Whole number

Even number

Real number

Some of two real numbers is also a real number , this property is called:

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Commutative property w.r.t addition

Closure property w.r.t. addition

Associative property w.r.t. addition

Distributive property w.r.t addition

The multiplicative inverse ofx^(-1) is

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x

a-2

0

1

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Closure law of addition

Associative law of addition

Additive inverse

Additive identity

In (x +iy) y is called as

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Imaginary part

Complex number

Real part

None of above

The set {1,2,3,4......} is called

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Set of natural numbers

Set of whole numbers

Set of rational number

Set of irrational numbers

√x = ______ if is a prime number

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Rational no

Natural no

Irrational no

Complex no

Such fraction which can not be written in the form ofp⁄q where p,q and q≠ 0,such fractions are called.

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Fractinal numbers

Rational Numbers

Even Numbers

Whole Numbers

For each real number, there is a number which is its

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Negative

Possitive

Opposite

Similar

Which element is the additive inverse of (a,b) in Complex numbers

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(a,0)

(0,b)

(a,b)

(-a,-b)

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Trichotomy property

Additive property of inequality

Transitive property

Multiplicative property

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ECAT Mathematics Chapter 1 Number System Online Test MCQs With Answers

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