Free Printable Imaginary and Complex Numbers Quiz

1.

What does i² = ?

a)

-1

b)

$\sqrt{-1}$

c)

1

d)

$-\sqrt{1}$

2.

Simplify the following. $-\sqrt{-49}$

a)

7

b)

-7

c)

7i

d)

-7i

3.

Simplify the following. $\sqrt{-54}$

a)

$3i\sqrt{6}$

b)

$-3\sqrt{6}$

c)

$14i\sqrt{13}$

d)

$-13\sqrt{5}$

4.

Multiply
$3i\left(-2+4i\right)$

a)

-6+12i

b)

-12-6i

c)

-2+7i

d)

12+6i

5.

Simplify the following.
$\sqrt{-36}$

a)

6

b)

-6

c)

-6i

d)

6i

6.

-4i + 7i

a)

3i

b)

11i

c)

-11i

d)

8 - 4i

7.

-7i - 7 + 5i

a)

-7 - 12i

b)

7 - 2i

c)

-7 + 12i

d)

-7 - 2i

8.

Calculate:
-12i + 7i

a)

19i

b)

-19i

c)

5i

d)

-5i

9.

Calculate (multiply):
(4 + 3i)(4 − 3i)

a)

16 − 9i²

b)

25

c)

7

d)

8 − 6i

10.

Calculate (multiply):
(1 − 2i)(6 + 5i)

a)

16 − 7i

b)

-16 + 7i

c)

-16 − 7i

d)

16 + 7i

11.

Simplify: $\sqrt{-100}$

a)

10i

b)

-10i

c)

10

d)

-10

12.

(2i)(3i)

a)

5i

b)

-5

c)

6i²

d)

-6

13.

Simplify $\sqrt{-45}$

a)

$3i\sqrt{5}$

b)

$-3i\sqrt{5}$

c)

$-i\sqrt{45}$

d)

45i

14.

Simplify $2\sqrt{-32}$

a)

$2i\sqrt{32}$

b)

$4i\sqrt{2}$

c)

$8i\sqrt{2}$

d)

$-16i\sqrt{2}$

15.

Simplify:
(-3i)(4i)(-5i)

a)

-60i

b)

60

c)

-60

d)

60i

Imaginary and Complex Numbers Quiz

Total questions: 15

Worksheet time: 30mins

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