Question # 1

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If Z = (1,2), then Z^-1= ?

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(0.2, 0.4)

(-0.2, 0.4)

(0.2, -0.4)

(-0.2, -0.4)

0.25 is ______

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An irrational number

A natural number

A prime number

A rational number

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Associative law of addition

Commutative law of addition

Additive identity

Closure law of addition

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Associative law of addition

Commutative law of addition

Additive identity

Closure law of addition

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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

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Commutative property of addition

Closure property of addition

Additive inverse

Associative property w.r.t. to addition

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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 = -1

X = 2, y = 2

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Principle of equality of fractions

Rule for product of fractions

Golden rule for fractions

Rule for quotient of fractions

2.333....is a

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Irrational no

Complex no

Rational no

None of these

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Rule of quotient of fraction

Golden rule of fraction

Rule for product of fraction

Principle for equality of fraction

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i³ =

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-1

i

-i

1

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Principle of equality of fractions

Rule for product of fraction

Rule for quotient of fraction

Golden rule of fractions

The additive inverse of 2/3 is

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3/2

-2/3

-3/2

0

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 = -1

X = 2, y = 2

3/2 is

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An irrational number

Whole number

A positive integer

A rational number

a.a^-1= a^-1.a = 1 is a

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Commutative law of multiplication

Multiplication identity

Associative law of multiplication

Multiplication inverse

QUQ, =

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N

R

W

Z

The square root of 2i - 20i is

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+-(5 - 2i)

+-(5 + 2i)

(5 - 2i)

None of these

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The square roots of negative numbers is called

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Real no

Complex no

Positive no

Negative no

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Rational

Irrational

Even

Odd

The multiplicative inverse of -3i is

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3i

-3i

-1/3i

1/3 i

∀a,b ε R, ab = be is a

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Commutative law of multiplication

Closure law of multiplication

Associative law of multiplication

Multiplicative identity

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

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