1. What is the ratio of red balls to blue balls if there are 4 red balls and 8 blue balls?
1:2
1:3
4:8
2:1
2. If there are 5 cats and 10 dogs, what is the ratio of dogs to cats?
5:10
1:2
1:1
2:1
3. A recipe requires 2 cups of flour for every 3 cups of sugar. What is this ratio?
2:3
3:4
4:6
3:2
4. For every 8 apples in a basket, there are 4 oranges. What is the ratio of oranges to apples?
4:8
1:1
1:2
2:1
5. In a bag of sweets, the ratio of red sweets to green sweets is 3:5. If there are 15 green sweets, how many red sweets are there?
10
9
15
12
6. A map scale shows 1 cm to 5 km. How many kilometres does 3 cm on the map represent?
10 km
15 km
20 km
5 km
7. If the ratio of boys to girls in a class is 4:5 and there are 20 girls, how many boys are there?
18
16
22
20
8. A drink mixture requires a ratio of 2 parts water to 1 part syrup. How many parts syrup are needed for 8 parts water?
6
4
8
2
9. To paint a room, a 3:1 ratio of white paint to blue paint is used. If 12 litres of white paint are used, how many litres of blue paint should be used?
6 litres
8 litres
3 litres
4 litres
10. A car travels 60 miles in 2 hours. What is the ratio of miles to hours?
60:2
30:1
30:2
1:30
11. In a garden, the ratio of rose plants to tulip plants is 7:4. If there are 28 rose plants, how many tulip plants are there?
20
18
16
12
12. A mixture requires a ratio of 5 parts water to 2 parts lemon juice. How many parts water are needed for 4 parts lemon juice?
10
8
20
5
13. The ratio of pencils to pens in a box is 3:4. If there are 12 pencils, how many pens are there?
18
16
12
8
14. If a scale model uses a scale of 1:50, what is the real height of a building that is 5 cm tall in the model?
100 cm
250 cm
50 cm
150 cm
15. The ratio of the length to the width of a rectangle is 4:3. If the width is 9 cm, what is the length?
16 cm
21 cm
18 cm
12 cm
16. A recipe for cookies requires a ratio of sugar to flour of 1:2. If you use 200 grams of flour, how much sugar is needed?
50 grams
100 grams
200 grams
150 grams
