Question # 1

Name the property used in 4 x (5 x 8) = ( 4 x 5) x 8

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Associative property of addition

Associative property of multiplication

Additive identity

Multiplicative identity

In R, the additive inverse of a is

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0

1

-a

1/a

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1

-1

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A rational number

An irrational number

An odd number

A prime number

Name the property used in 4 + 9 = 9 + 4

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Associative property of addition

Commutative property of addition

Distributive property

Additive identity

(a, b) + (-a, -b) =

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(0,0)

(a, b)

(-a, -b)

(1, 1)

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In R the number of identity elements w.r.t.'.' is

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One

Two

Three

Four

Which of the following has the same value as i¹¹³?

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i

-1

-i

1

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

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- x

Infinite set

Φ

{-4,4}

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a = a

a < a

a > a

a²= a

Union of the sets of rational and irrational numbers is called 6th set of

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Natural numbers

Real numbers

Whole numbers

Prime numbers

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(√3+√5)+√7 = √3 +(√5 +√7) property used in above is

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Commutative property of addition

Closure property of addition

Additive inverse

Associative property w.r.t to adition

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Associative law of addition

Commutative law of addition

Additive identity

Closure law of addition

Every real number is

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a positive integer

a rational number

a negative integer

a complex number

In R the number of identity element w.r.t '+' is

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One

Two

Three

Four

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Trichotomy property

Additive property of inequality

Transitive property

Multiplicative property

0.25 is ______

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An irrational number

A natural number

A prime number

A rational number

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additive property

multiplicative property

additive identity

multiplicative identity

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The additive inverse of 1 is

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1

-1

0

Does not exist

In R, the multiplicative identity is

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0

1

-1

None

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A complex number

A rational number

A natural number

An irrational number

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What is the conjugate of -6 -i?

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-6 +i

6+i

-6 -i

6 -i

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A positive integer

A negative integer

A natural number

An irrational number

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

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ECAT Mathematics Chapter 1 Number System Online Test MCQs With Answers

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