Question # 1

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a = Im

a = Re(z)

a = Natural number

None of these

If Z < 0 then x < y→

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xz < yz

xz > yz

xz = yz

None of these

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Which of the following sets have the Closure Property w.r.t addition.

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{0}

{0, -1}

{0,1}

There exists a unique real number 1, is called ________ in multiplication:

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Multiplicative inverse

Additive inverse

Multiplicative identity

Additive identity

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5/4

4/5

-5/4

-4/5

Which of the following is closure property w.r.to multiplications:

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a + b∈ R∀ a, b∈ R

a. b∈ R∀ a, b∈ R

a + b = b + a∀a,b∈ R

a.b = b.a∀a,b∈ R

∀ a∈ R⇒ a = a is __________ property:

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Reflexive

Symmetric

Transitive

Additive property

Real part of 2ab ( i + i²) is:

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2ab

-2ab

2abi

-2abi

Which of the following is associative property w.r.to addition:

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a + b = b + a

a (bc) = (ab) c

a + (b + c) = (a + b) + c

None of these

Solution of x²= -1 in real numbers:

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-1

+1

Solution does not exist

Conjugate of real number is:

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Pure imaginary

Real

Complex

None

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Transtitive

Multiplicative inverse

Multiplicative identity

None

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-2/5

2/5

5/2

Every real number is also a complex number with imaginary part as ______

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1

b

O

10

Identify the property used in x > y Or x = y Or x < y:

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Symmetric

Reflexive

Irichotomy

Transitive

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Mathematics 9th Class English Medium Unit 2 Online Test MCQs With Answers

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