Chapter 3 (Revision)

Calculate  $0.83^2$  

Choose only perfect squares.

• 132

• 360

• 441

• 529

The area of a square floor is  $225\ m^2.$  
Find the length, in m, each side of the floor

• 15

• 56.25

• 112.5

The diagram shows a dice. The area of each face is  $64\ cm^2.\$  
What is the total length of all the sides of the dice?

• 16

• 32

• 96

• 256

Calculate  $\sqrt{49}+\ \sqrt{2\frac{1}{4}}$  
Give your answer in decimal point.

The volume of a cube is $125\ cm^3.$  
Calculate the total length of all its sides.

• 40 cm

• 60 cm

• 120 cm

The box shown is a cube. If its width is 8 cm, calculate the volume of the box.

Calculate  $_3\sqrt{3375}\div\ _3\sqrt{512}$  

Calculate  $_{3\ \sqrt{-\frac{192}{81}}\ \ \ \ }$  

•  $-\frac{4}{3}$  

•  $-\frac{3}{4}$  

Find the value of  $\left(\frac{4}{7}\right)^3$  

•  $\frac{12}{21}$  

•  $\frac{64}{343}$