Question # 1

Rational numbers are:

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repeating decimals

terminatingdecimals

periodicdecimals

all of these

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closureproperty

associativeproperty

commutativeproperty

trichotomyproperty

Product of a complex number and its conjugate is:

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a real number

irrationalnumber

a complexnumber

either real number or complexnumber

Factors of x² + y² are:

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(x + iy) (x - iy)

(x + y) (x - y)

(x + y) (x + y)

none

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0

i

-i

1

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

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a

b

bi

none of these

The set of negative integers is closed with respect to:

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addition

multiplication

both (a) and (b)

subtraction

Zero is:

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a natural number

a whole number

a positive integer

a negativeinteger

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integer

rationalnumber

irrationalnumber

naturalnumber

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rationalnumber

irrationalnumber

naturalnumber

wholenumber

The identity element with respect to addition is:

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0

1

-1

0 and 1

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

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b

-b

a

-a

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Reflexive property

Symmetricproperty

Transitiveproperty

Trichotomyproperty

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archimedean property

transitive property

multiplicative property

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integer

rational number

irrational number

natural number

Which of the following is correct:

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2 + 7i > 10 + i

1 + i > 1 - i

4 + 3i > 1 + 3i

none of these

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

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0

-a

a

Division of a natural number by another natural number gives:

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always a natural number

always an integer

always a rationalnumber

always an irrational number

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If z₁ = 4i and z₂ = 3 - 9i, then z₁ + z₂ =

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3 - 5i

3i - 5

7 - 9i

3 + 5i

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