Question # 1

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The sum of complex number (a,b) and (c,d) is

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The√ is used for the

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Positive square root

Negative square root

+ve and -ve square root

Whole number

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

A subset of set of complex number whose elements are of the form (a,0) is called

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Real number

Complex number

Rational number

Irrational number

2.333....is a

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Irrational no

Complex no

Rational no

None of these

Every real number is

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A complex number

A rational number

A natural number

A prime 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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Associate law of addition

Commutative law of addition

Additive identity

Closure law of addition

The set of natural no. is closed under

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multiplication

subtraction

difference

division

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i =

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The symbol of irrational is

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W

N

Q

Q'

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Reflexive property

Symmetric property

Transitive property

Additive property

√11 is

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an irrational number

Rational number

odd number

Negative number

∀a,b, c ε R,a +c = b + c = > a = b

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Reflexive property

Symmetric property

Cancellations property w.r.t. addition

Transitive property

The set of rationals numbers between 0 and I is

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Finite

Null set

Infinite

None of these

i¹⁰¹=

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i

i²

-i

-1

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None of these

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Associative law of addition

Commutative law of addition

Additive identity

Closure law of addition

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Reflexive property

Symmetric property

Transitive property

Additive property

1.4142135... is ______

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A natural number

A rational number

A prime number

An irrational number

A non-terminating, non-recurring decimal represent

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A natural number

A rational number

An irrational number

A prime number

Every real number is

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a positive integer

a rational number

a negative integer

a complex number

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

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

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(a, 0)

(0, b)

(a, b)

(-a, -b)

The set {0,-1} hold closure property under

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Addition

Both a & c

Multiplication

None of these

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(a + b)c = ac + bc

a + b = b + a

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

a(b +c) = ab + ac

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

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