Question # 1

Zero is:

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a natural number

a whole number

a positive integer

a negativeinteger

Factors of x² + y² are:

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(x + iy) (x - iy)

(x + y) (x - y)

(x + y) (x + y)

none

Conjugate of a- i b is:

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b + ia

-a + ib

-a - ib

a + ib

The imaginary part of the complex number a + bi is:

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a

b

bi

none of these

The identity element with respect to addition is:

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0

1

-1

0 and 1

If z = x + i y = r (cos Θ + i sin Θ), then arg z is:

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tan Θ

cos²Θ + sin²Θ

r

Θ

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π, e are:

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integers

natural numbers

rationalnumbers

irrationalnumbers

The ordered pairs (2, 5) and (5, 2) are:

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not equal

equal

disjoint

empty

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integer

rationalnumber

irrationalnumber

naturalnumber

Irrational numbers are:

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terminating decimals

non-terminating decimals

non-terminating, repeating decimals

non-terminating, non repeating

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additive property

multiplicative inverseproperty

transitive property

negative property

Rational numbers are:

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repeating decimals

terminatingdecimals

periodicdecimals

all of these

i² + 1 =

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-1

0

i

1

Every real number is also a/an:

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integer

rational number

irrationalnumber

complexnumber

The multiplicative invers of a non-zero real number a is:

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0

-a

a

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closureproperty

associativeproperty

commutativeproperty

trichotomyproperty

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i

0

The set of negative integers is closed with respect to:

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addition

multiplication

both (a) and (b)

subtraction

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Reflexive property

Symmetricproperty

Transitiveproperty

Trichotomyproperty

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