Ratio

1. In Lucy’s class there are 12 boys and 18 girls. Write the ratio of girls:boys in its simplest form.

• 12:30

• 3:2

• 18:12

• 2:3

2. Gertie has two grandchildren, Jasmine, aged 2, and Holly, aged 4. Gertie divides £30 between them in the ratio of their ages. How much do they each get?

• Jasmine £15. Gertie £15

• Jasmine £15. Gertie £7.50

• Jasmine £10. Gertie £20

• Jasmine £2. Gertie £4

3. The ratio of men:women working in a company is 3:5. What proportion of the employees are women?

• 3/5

• 3/8

• 5/8

• 5/3

4. The ratio of cups of flour:cups of water in a pizza dough recipe is 9:4. A pizza restaurant makes a large quantity of dough, using 36 cups of flour. How much water should they use?

• 16 cups

• 13 cups

• 11 cups

5. The angles in a triangle are in the ratio 3:4:5. Work out the size of each angle.

• 30∘,40∘, 50∘

• 22.5∘,30∘, ∘37.5

• 60∘,60∘, 60∘

• 45∘,60∘, 75∘

6. Paint Pro makes pink paint by mixing red paint and white paint in the ratio 3:4.

Colour Co makes pink paint by mixing red paint and white paint in the ratio 5:7. 

Which company uses a higher proportion of red paint in their mixture?

• They are the same.

• Colour Co

• Paint Pro

• It is impossible to tell.

7. The students in Ellie’s class walk, cycle or drive to school in the ratio 2:1:4. If 8 students walk, how many students are there in Ellie’s class altogether?

• 56

• 16

• 30

• 28

A bag contains counters. 40% of the counters are red and the rest are yellow.

Write down the ratio of red counters:yellow counters. Give your answer in the form 1:n.

• 1:4

• 4:6

• 1:1.5

• 1:6

Rosie and Jim share some sweets in the ratio 5:7. If Jim gets 12 sweets more than Rosie, work out the number of sweets that Rosie gets.

• 30

• 5

• 2.4

• 72

10. Rahim is saving for a new bike which will cost £480. Rahim earns £1500 per month. Rahim spends his money on bills, food and extras in the ratio 8:3:4. Of the money he spends on extras, he spends 80% and puts 20% into his savings account.

How long will it take Rahim to save for his new bike?

• 1 month

• 6 months

• 3 months

• 5 months