Question # 1

Irrational numbers are:

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terminating decimals

non-terminating decimals

non-terminating, repeating decimals

non-terminating, non repeating

Product of a complex number and its conjugate is:

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a real number

irrationalnumber

a complexnumber

either real number or complexnumber

Every real number is also a/an:

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integer

rational number

irrationalnumber

complexnumber

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

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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integer

rational number

irrational number

natural number

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rationalnumber

irrationalnumber

naturalnumber

wholenumber

π is defined as:

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ration of diameter of a circle to its circumference

ration of the circumference of a circle to its diameter

ration of area of a circle to its circumference

ration of the circumference of a circle to its area

Rational numbers are:

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repeating decimals

terminatingdecimals

periodicdecimals

all of these

The identity element with respect to addition is:

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0

1

-1

0 and 1

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z is purely real

z is any complex number

z is purely imaginary

real part of z = imaginary part of z

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integer

rationalnumber

irrationalnumber

naturalnumber

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

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0

-a

a

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closure property w.r.t multiplication

commutativeproperty w.r.t multiplication

associativeproperty w.r.t multiplication

trichotomy property

Modulus of 15 i + 20 is:

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20

15

25

none of the above

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i

0

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

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a

b

bi

none of these

i² + 1 =

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-1

0

i

1

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

Conjugate of complex number (-a, -b) is:

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(-a, b)

(-a, -b)

(a, -b)

none of these

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