Number GCSE Higher

Write in standard form

3500

• $3.5\times10^3$

• $35\times10^1$

• $3.5\times10^2$

Evaluate, leaving your answer in standard form

 $\left(1.2\times10^{-2}\right)+\left(2.4\times10^{-1}\right)$  

•  $2.52\times10^1$ 

•  $2.52\times10^{-1}$ 

•  $25.2\times10^{-2}$ 

Evaluate, leaving your answer in standard form

 $\left(1.2\times10^3\right)\div\left(2.4\times10^5\right)$  

•  $0.5\times10^{-3}$ 

•  $5\times10^{-3}$ 

•  $5\times10^{-2}$ 

Joanne buys a car for £5000 and sells it for £2400. What is the percentage loss?

• 48%

• 52%

• 108%

• 8%

I buy a watch in a sale of 35%. In the sale the watch costs £78. How much did it cost before?

• £120

• £105.30

• £110

• £50.70

A pencil measures 14cm to the nearest centimetre. Which is the correct error interval?

• $13.5<x\le14.5\$

• $13.5<x<14.5\$

• $13.5\ge x>14.5$

• $13.5\le x<14.5$

A field measures 14m by 12m, both measured to the nearest metre. What is the minimum area?

• 167.5

• 168.75

• 155.25

• 152.75

A number is 7 when it has been truncated. Which is the correct error interval?

• $6.5\le x<7.5$

• $7\le x<8$

• $6\le x<7$

• $7<x<8$

Jack has £45, rounded to the nearest 5 pound. What is the minimum amount of money that he has?

• £42.50

• £44.50

• £40

• £47.50

Evaluate
 $2\frac{2}{3}+5\ \frac{1}{7}$  

•  $7\ \frac{17}{21}$  

•  $2\ \frac{1}{21}$  

•  $7\ \frac{13}{21}$