Y9 review quiz

Estimate

 $\left(17.9-\sqrt{36.13}\right)\times3.89$  

• 48

• - 80

• 12

• 14

Ben and Sadie are going on a sponsored walk around a circuit.

Ben takes 25 min to do one circuit and Sadie takes 45 min.

They start together at 9:30 am.

When will they next cross the start line together?

• 1:15 pm

• 12:15

• 12:45

• 1 pm

Write this number in standard form.

 $0.00000065$  

•  $6.5\times10^{-7}$  

•  $65\times10^{-8}$  

•  $6.5\times10^7$  

•  $65\times10^8$  

Write this number in standard form.

 $0.9\ million$ 

•  $9\times10^6$  

•  $9\times10^7$  

•  $9\times10^5$  

•  $9\times10^{-5}$  

Write each number in standard form.

 $320\times10^7$ 

•  $32\times10^8$   

•  $32\times10^6$  

•  $3.2\times10^8$  

•  $3.2\times10^9$  

 $\left(\frac{4}{3}\right)^{-2}$  

Write this number as a fraction in its simplest form.

•  $\frac{3}{4}$  

•  $\frac{16}{9}$  

•  $\frac{9}{16}$  

•  $-\frac{16}{9}$  

 $9^{18}=27^x$  

Work out the value of x.

• 6

• 15

• 9

• 12

 $\frac{8}{\sqrt{6}}$  

Rationalise the denominator.

•  $\frac{8\sqrt{6}}{6}$  

•  $\frac{4\sqrt{6}}{3}$  

•  $8\sqrt{6}$  

•  $\frac{\sqrt{6}}{8}$  

Solve

 $4\left(5x-2\right)=32$  

• 1.2

•  $\frac{6}{5}$  

• -2

• 2

Find the first three terms of the sequence with nth term

 $u_{n_{ }}=81\times\left(\frac{1}{3}\right)^n$  

• 3, 9, 27

• 27, 54, 81

• 27, 9, 3

• 81, 54, 27