Estimating Square Roots Challenge

What is a perfect square?

• A number whose square root is a whole number

• A number that is always even

• A number that is always odd

• A number that cannot be divided by any other number

Which of the following is NOT a perfect square?

• 45

• 225

• 196

• 64

How can you estimate the square root of a non-perfect square?

• By guessing

• By dividing the number by 2

• By using the knowledge of perfect squares

• By using a calculator

The square root of 50 is closest to which two perfect squares?

• 25 and 36

• 36 and 49

• 64 and 81

• 49 and 64

What is the estimated square root of 50?

• 7.5

• 8.0

• 7.1

• 6.9

The square root of 22 is closest to which two perfect squares?

• 9 and 16

• 36 and 49

• 25 and 36

• 16 and 25

What is the estimated square root of 22?

• 4.5

• 5.0

• 4.3

• 4.7

The square root of 103 is closest to which two perfect squares?

• 81 and 100

• 64 and 81

• 100 and 121

• 121 and 144

What is the estimated square root of 103?

• 10.1

• 9.8

• 10.5

• 11.0

What is the estimated square root of 65?

• 7.9

• 8.2

• 8.1

• 8.0