1) Simplify the ratio 20:30 a) 2:3 b) 4:6 c) 10:15 d) 20:30 2) There are 30 pupils in a class. The number of boys to girls is in the ratio 3:7. How many boys are there? a) 9 b) 10 c) 11 d) 14 e) 12 3) The ratio of orange to water to make a particular juice is 2:7. If I use 8 litres of orange, how much water do I need? a) 28 litres b) 16 litres c) 18 litres d) 13 litres 4) Paul is 12 years old. His mum is 28 years older. Write their age to age ratio in its simplest form. a) 3:10 b) 12:28 c) 6:14 d) 3:7 5) Simplify fully the ratio 2m:80cm a) 5:2 b) 1:40 c) 40:1 d) 2:5 6) The ratio of girls to boys in a maths class is 3:5, what fraction of the class are girls? a) 3/5 b) 5/3 c) 5/8 d) 3/8 7) Which is the equivalent ratio of 2 : 3? a) 20 : 33 b) 20 : 60 c) 16 : 22 d) 40 : 60 8) The ratio of cups of flour & water in a pizza dough recipe is 9:4. If 36 cups of flour are used, how much water should be used? a) 16 b) 11 c) 13 9) What is the length of the ramp when the height is 72cm, using the ratio 1:12 ? a) 84 m b) 8.64 m c) 86.4 cm d) 6 cm 10) What is the height of the ramp when the length is 17.6 m, using the ratio 1:16 ? a) 0.9 m b) 281.6 m c) 1100 cm d) 1.1 m 11) Tháng nào ngắn nhất? - 5 bonus points a) 1 b) 2 12) a part of your head a) 1 b) 2

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