Powers and roots

What is the value of  $3^2$  

• 12

• 6

• 9

• 5

Evaluate the following:
 $\sqrt{64}$  

• 4

• 32

• 8

• 60

Which of these is a cube number?

• 8

• 15

• 100

• 3

Simplify the following:
 $2^2\times2^4$  

•  $2^8$  

•  $4^8$  

•  $2^6$  

•  $32$  

What is the square root of nine?

• 3

• 4.5

• 81

• 18

John wants to work out the square of  $-7$   using his calculator.
Which of these would give him the correct answer?
1)  $-7^2$  
2)  $\left(-7\right)^2$  
3)  $-7\times-7$  
4)  $-7\times2$  

• 1, 2 and 3

• 1 and 2

• 4 only

• 2 and 3

What is the value of the following expression?
 $\left(3+1\times3\right)^2$ 

• 90

• 144

• 36

• 18

Which of these calculations does not give an integer answer?

• $\sqrt{16}+\sqrt{100}$

• $\sqrt{64}+8^{\frac{1}{3}}$

• $27^{\frac{1}{3}}+1^{\frac{1}{3}}$

• $\sqrt{25}+\sqrt{90}$

A square has an area 64 mm².

What is the length of one side of the square?

• 16 mm

• 32 mm

• 8 m

• 4096 mm

What is the value of 0.5²?

• 25

• 2.5

• 0.25

• 1