Free Printable Complex Numbers Review

1.

What does $i$ represent?

a)

$1$

b)

$-1$

c)

$\sqrt{1}$

d)

$\sqrt{-1}$

2.

What is $i^2$ equal to?

a)

$1$

b)

$-1$

c)

$\sqrt{1}$

d)

$\sqrt{-1}$

3.

What is $\sqrt{25}$ ?

a)

$5$

b)

$-5$

c)

$5i$

d)

$-5i$

4.

What is $\sqrt{-25}$ ?

a)

$5$

b)

$-5$

c)

$5i$

d)

$-5i$

5.

What is $-\sqrt{-25}$ ?

a)

$5$

b)

$-5$

c)

$5i$

d)

$-5i$

6.

Simplify: $\left(6-3i\right)+\left(-1-4i\right)$

a)

$5-7i$

b)

$5-i$

c)

$5+i$

d)

$5+7i$

7.

What can you add to $3+2i$ to get $7-8i$ ?

a)

$10-6i$

b)

$10-10i$

c)

$4-10i$

d)

$-4+10i$

8.

Which point represents $-2+4i$ ?

a)

A

b)

B

c)

C

d)

D

9.

Which complex number is represented by the point?

a)

$4+3i$

b)

$-4+3i$

c)

$3+4i$

d)

$3-4i$

10.

Which complex numbers are being multiplied here?

a)

$4+2i$ and $2+5i$

b)

$4+2i$ and $-2+5i$

c)

$-2+2i$ and $4+5i$

d)

$2$ and $7i$

11.

How can we simplify $10i^2$ ?

a)

$10i$

b)

$-10i$

c)

$10\left(-1\right)$ , which is $-10$

d)

$10\left(-1\right)^2$ , which is $10$

12.

Based on the completed work, what is $\left(4+2i\right)\left(-2+5i\right)$ ?

a)

$-18+16i$

b)

$18+16i$

c)

$-18+24i$

d)

$18+24i$

Complex Numbers Review

Total questions: 12

Worksheet time: 6mins

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