Free Printable Imaginary/Complex Numbers Intro

1.

Which of the following are complex numbers?

a)

-3

b)

5i

c)

3+4i

d)

0

2.

Which of the following are real numbers?

a)

2i

b)

1-i

c)

3

d)

0+2i

3.

Which of the following are imaginary numbers?

a)

0

b)

$\sqrt{-1}$

c)

-i

d)

4-2i

4.

Simplify: $i^{15}$

a)

i

b)

-1

c)

-i

d)

1

5.

Simplify: $i^{125}$

a)

i

b)

-1

c)

-i

d)

1

6.

Simplify: $i^{512}$

a)

i

b)

-1

c)

-i

d)

1

7.

Which graph represents the complex number $3-4i$ ?

a)

b)

c)

d)

8.

What complex number is graphed here?

a)

-4+2i

b)

2-4i

c)

4-2i

d)

2i-4

9.

Simplify: $\left|-1-5i\right|$

a)

$1+5i$

b)

$\sqrt{26}$

c)

$\sqrt{6}$

d)

$6i$

10.

Simplify: $\left|2-2i\right|$

a)

$2+2i$

b)

$0$

c)

$\sqrt{8}$

d)

$2\sqrt{2}$

Imaginary/Complex Numbers Intro

Total questions: 10

Worksheet time: 5mins

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