 Squares, Cubes, Square Roots, and Cube Roots
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Practice 16 QuestionsShow answers
• Question 1
30 seconds
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Q.

$\sqrt{16}=?$

8

2

4

32

• Question 2
30 seconds
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Q.

$9^2=18$  True or false?

True

False

• Question 3
30 seconds
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Q.

$-\sqrt{144}$

12

-12

-72

none of the above (imaginary number)

• Question 4
30 seconds
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Q.

$\sqrt{-144}$

12

-12

72

none of the above (imaginary number)

• Question 5
30 seconds
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Q.

$3_{\sqrt{8}}$    (cube root of 8)

2

$\pm2$

-2

None of the above

• Question 6
30 seconds
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Q.

$3_{\sqrt{-1}}$  (cube root of -1)

$\pm1$

1

-1

none of the above (imaginary number)

• Question 7
30 seconds
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Q.

The area of a square painting is 81  $cm^2$  . What is the length of one side?

9

-9

40.5

-40.5

• Question 8
30 seconds
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Q.

$-6^2$  = ?

36

-36

12

-12

• Question 9
30 seconds
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Q.

$\left(-6\right)^2$  = ?

12

-12

-36

36

• Question 10
30 seconds
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Q.

$\sqrt{\left(\frac{16}{81}\right)}\ \ =\ ?$

$\frac{8}{27}$

$\frac{8}{9}$

$\frac{4}{9}$

$\frac{4}{3}$

• Question 11
30 seconds
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Q.

Solve for p when  $p^2=100$

$\pm10$

10

$\pm1,000$

1,000

• Question 12
30 seconds
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Q.

Solve for x when  $x^3=\frac{1}{8}$

2

$\frac{1}{64}$

$\frac{1}{3}$

$\frac{1}{2}$

• Question 13
30 seconds
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Q.

Write an equation for the phrase "Two cubed is equal to the square root of x".

$4=\sqrt{16}$

$2^2=\sqrt{x}$

$2^{3\ }=\sqrt{x}$

$\sqrt{x}=2$

• Question 14
30 seconds
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Q.

A cube with side length s has a volume of 64 cubic units. What is the length of one side?

4

8

16

32

• Question 15
30 seconds
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Q.

Select the set with all perfect squares.

-144, 9, 50, 75, 81, 100

9, 50, 81, 100

9, 50, 75, 81, 100

9, 81, 100

• Question 16
30 seconds
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Q.

Which of the following is irrational?

$\sqrt{49}$
$\sqrt{50}$
$\sqrt{81}$
$\sqrt{121}$