Estimating Square and Cube Roots

What is a perfect square?

• A number that has three equal factors

• A number that is divisible by 2

• A number that has two equal factors

• A number that is a multiple of 10

Which of the following is a perfect square?

• 30

• 35

• 25

• 20

What is the estimated square root of 24 to the nearest integer?

• 6

• 4

• 7

• 5

Which perfect squares are used to estimate the square root of 83?

• 64 and 81

• 49 and 64

• 100 and 121

• 81 and 100

What is the estimated square root of 140 to the nearest integer?

• 11

• 10

• 13

• 12

What is a perfect cube?

• A number that is divisible by 3

• A number that is a multiple of 5

• A number that has two equal factors

• A number that has three equal factors

Which of the following is a perfect cube?

• 16

• 27

• 36

• 45

What is the estimated cube root of 60 to the nearest integer?

• 3

• 4

• 5

• 6

Which perfect cubes are used to estimate the cube root of 25?

• 8 and 27

• 125 and 216

• 27 and 64

• 64 and 125

What is the estimated cube root of 132 to the nearest integer?

• 4

• 7

• 5

• 6