Rational and Irrational Numbers

Which of the following is an irrational number?

• $\sqrt{81}$

• $\sqrt{28}$

• $\sqrt{49}$

• $\sqrt{36}$

Which of the following is an irrational number?

• $\sqrt{16}$

• $\sqrt{100}$

• $\sqrt{50}$

• $\sqrt{81}$

Which of the following is a perfect square?

• 144

• 161

• 89

• 28

Which of the following is a perfect square?

• 21

• 64

• 113

• 186

What is the square root of  $\sqrt{81}$  

• 1

• 9

• 27

• 81

What two numbers does the square root of  $\sqrt{46}$  fall between?

• 5 and 6

• 6 and 7

• 7 and 8

• 8 and 9

What two numbers does the square root of  $\sqrt{156}$  fall between?

• 11 and 12

• 12 and 13

• 13 and 14

• 14 and 15

Approximate  $\sqrt{21}$  

• 4.3

• 4.4

• 4.5

• 4.6

Approximate  $\sqrt{76}$  to the nearest tenth. 

• 8.5

• 8.6

• 8.7

• 8.8

What is the cube root of the perfect cube 216

• 5

• 6

• 7

• 8