Question # 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

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

Multiplicative inverse of -i is:

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i

-i

1

-1

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i

0

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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rationalnumber

irrationalnumber

naturalnumber

wholenumber

Modulus of 15 i + 20 is:

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20

15

25

none of the above

The multiplicative identity of real numbers is:

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0

1

2

-1

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

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not equal

equal

disjoint

empty

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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11th Class ICS Mathematics Chapter 1 Test Online MCQs With Answers

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