Question # 1

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Closure law of addition

Closure law of multiplication

Commutative law of addition

Commutative law of multiplication

∀x,y∈ R and x < 0, y < 0, which one is true

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xy < o

xy = o

xy > o

None of these

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Principle of equality of fractions

Rule for product of fraction

Rule for quotient of fraction

Golden rule of fractions

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

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(0,0)

(a, b)

(-a, -b)

(1, 1)

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Closure law of addition

Associative law of addition

Commutative law of multiplication

Associative law of multiplication

In polar form of complex number r =

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The order axioms are satisfied by set of

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C

C and R

R

None of these

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real number

complex number

rational number

irrational number

The set { 1 , -1} is closed w.r.t.

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Addition

Multiplications

Subtraction

None of these

If ∀a,b ε R,then a +b ε R is a property

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Closure law of addition

Associative law of addition

Additive inverse

Additive identity

For any real numbers x,y,xy=o ⇒

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x ≠ 0 ∧ y ≠ 0

x = 0 ∨ y = 0

x = 0

y = 0

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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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Associative law of multiplication

Commutative law of addition

Commutative law of multiplication

Associative law of addition

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

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{ 0 }

{ 1 }

{ 0, -1}

{ 1, -1}

0.25 is ______

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An irrational number

A natural number

A prime number

A rational number

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Commutative property of addition

Closure property of addition

Additive inverse

Associative property w.r.t. to addition

If z=(x,y) then z has no multiplicative inverse when

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x ≠ 0, y = 0

x = 0, y = 0

x = 0, y ≠ 0

None of these

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Additive property of inequality

Commutative property

Additive inverse

Additive identity

The multiplicative inverse of (a,b) is

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Associative law of addition

Commutative law of addition

Additive identity

Closure law of addition

i³=

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-1

i

-i

1

The negative square root of 9 can be written as:

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-√9

√9

√18

-√18

It is not possible to find the exact value of

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π

√9

∛27

√1

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(a + b)c = ac + bc

a + b = b + a

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

a(b +c) = ab + ac

The multiplicative inverse of 0 is

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1

-1

0

Does not exist

The set of positive integers, 0 and negative integers is known as the set of

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Natural numbers

Rational numbers

All integers

Irrational numbers

∀x, y ∈ R, either x = y or x > y or x < y is

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Transitive property

Reflexive property

Trichotomy property

None of these

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

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

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