CHAPTER 3 : Squares, Square roots, Cubes & Cube Roots

Wgich of the following is a perfect square?

• -9

• $\frac{3}{25}$

• $\frac{1}{161}$
  

• 121

Find the value of ( - 0.4)².

• 0.16

• 0.64

• 16

• 64

Given

 $\sqrt{625}$  = 25
Thus, $25^2$ =  

• 1000

• 625

• 100

• 25

Which of the following is not a perfect square?

• 1

• 121

• 160

• 225

( $-\frac{3}{4}$ ) $^3$  

•  $\frac{9}{16}$  

•  $-\frac{27}{16}$  

•  $-\frac{27}{4}$  

•  $-\frac{27}{64}$  

 $3\sqrt{-0.216}$  =

• -0.6

• 0.6

• 0.06

• 0.006

Estimate the value

 $11.4^3$  

• 1731

• 1500

• 1331

• 1000

Calculate the value of  $2^{2\ -\ 3}\sqrt{216}$  

• -2

• -8

• 4

• 10

The area of a square field is 256 $m^2$ . What is the distance, in m, that Salina had walked if she walked around the field twice?

• 16

• 32

• 64

• 128

Jeremy uses 6 pieces of rectangular cardboard with the length of 10cm to build four cube-shaped boxes. Calculate the volume, in  $cm^3$  , of a box.

• 25

• 100

• 125

• 1000