Question # 1

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

Conjugate of -3 -2 i is:

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3 + 2i

-3 + 2i

2 + 3i

-2 + 3i

Multiplicative inverse of -i is:

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i

-i

1

-1

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

Factors of x² + y² are:

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(x + iy) (x - iy)

(x + y) (x - y)

(x + y) (x + y)

none

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

The additive inverse of a real number is a:

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0

-a

a

The multiplicative identity of real numbers is:

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0

1

2

-1

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cancellation property w.r.t multiplication

cancellationproperty w.r.t addition

multiplicativeproperty

additiveproperty

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

Modulus of 15 i + 20 is:

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20

15

25

none of the above

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0

i

-i

1

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

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not equal

equal

disjoint

empty

Irrational numbers are:

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terminating decimals

non-terminating decimals

non-terminating, repeating decimals

non-terminating, non repeating

Conjugate of a + i b is:

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-a + ib

a + ib

-a - ib

a - ib

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

Zero is:

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a natural number

a whole number

a positive integer

a negativeinteger

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rational number

irrational number

natural number

whole number

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