Question # 1

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0

1

-1

2

If P is a whole number greater than 1, which has only P and I are factors. Then P is called

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Wholw number

Prime number

Even number

Odd number

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0

1

-1

None of these

i =

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√1

√2

√-2

√-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 = -1

X = 2, y = 2

The square root of 2i - 20i is

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+-(5 - 2i)

+-(5 + 2i)

(5 - 2i)

None of these

The multiplicative inverse of -3i is

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3i

-3i

-1/3i

1/3 i

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15

15 i

-15 i

-15

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Which of the following has the same value as i¹¹³?

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i

-1

-i

1

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Associative property of addition

Commutative property of addition

Distributive property

Additive identity

202.04 is an example of

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Recurring decimals

Non-recurring decimals

Terminating decimals

None of these

Any whole number can be written as a product of factors which are

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Even number

Odd numbers

Prime number

Rational number

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

If in a set of real no a is multiplicative identity then

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a,a = a²

a,a = 1

a,a = 0

None of these

Name the property used in 100 + 0 = 100

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Additive inverse

Multiplicative inverse

Additive identity

Multiplicative identity

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1

-i

i

0

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Associative law of multiplication

Commutative law of addition

Commutative law of multiplication

Associative law of addition

i²=

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1

2

-1

0

i^-(4n+2)= -------------------------------

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1

i

-1

-i

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Additive property of inequality

Commutative property

Additive inverse

Additive identity

The additive inverse of 1 is

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1

-1

0

Does not exist

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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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Every natural number is

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A prime number

An irrational number

An integer

An even number

If a set S contains n elements then P (S) has ........ number of elements

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2ⁿ

2ⁿ²

2.n

n²

√-1 b=

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b

2

2b

None of these

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

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