Question # 1

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z is purely imaginary

a is any complex number

z is real

None of these

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Rational

Irrational

Even

Odd

The value of i⁴ⁿ⁺¹

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1

-1

i

i²

i =

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√1

√2

√-2

√-1

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

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x

y

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Principle of equality of fractions

Rule for product of fractions

Golden rule for fractions

Rule for quotient of fractions

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additive property

multiplicative property

additive inverse

additive identity

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

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(a + b)c = ac + bc

a + b = b + a

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

a(b +c) = ab + ac

3/4 is ______

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An odd number

An even number

A natural number

A rational number

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QUQ, =

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N

R

W

Z

Multiplicative inverse of "1" is

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0

±1

1

{0,1}

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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1

-1

If z = (x,y) , then z ̅ =

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(-x,y)

(x,-y)

(-x, -y)

None of these

Every prime number is also

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Rational number

Even number

Irrational number

Multiple of two numbers

If 4 > b or a < b than a = b is a

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Additive property

Transitive property

Trichotomy property of inequality

None of above

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Rational

Irrational

Natural

Odd

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Commutative property of addition

Closure property of addition

Additive inverse

Associative property w.r.t. to addition

The identity element with respect to subtraction is

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0

-1

0 and 1

None of thes

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i² =

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1

2

-1

0

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

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Addition

Multiplications

Subtraction

None of these

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Trichotomy property

Additive property of inequality

Transitive property

Multiplicative property

In (x + iy) x is the known as

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Imaginary part of complex number

Real part of complex number

Complex number

None of above

If 0 = R, thenthe additive inverse of a is

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1/9

^1/-9

a

-a

√23 is

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A rational number

A irrational number

An even integer

A factor of 36

Every irrational number is

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A real number

A prime number

A natural number

An integer

1/3 is ______

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A prime number

An integer

A rational number

An irrational number

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

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