Study

If a car travels 300 km in 3 hours, what is the ratio of kilometers to hours? 100:1

3:300

1:100

300:3

If 3 kg of flour is needed for 12 cakes, how many kg of flour are needed for 4 cakes? 1 kg

4 kg

3 kg

2 kg

In a proportion, if a/b = c/d, and a = 8, b = 4, c = 2, what is the value of d? 1

2

8

4

The ratio of dogs to cats in a pet shop is 5:3. If there are 40 animals in total, how many dogs are there? 25 dogs

30 dogs

10 dogs

15 dogs

A bag contains black and white marbles in the ratio of 2:3. If there are 10 black marbles, how many white marbles are there? 15 white marbles

10 white marbles

20 white marbles

5 white marbles

A scale drawing of a building is made with a scale of 1:100. If the height of the drawing is 0.5 m, what is the actual height of the building? 50 m

100 m

5 m

10 m

A map uses a scale of 1 cm to 100 km. How far apart are two cities if the distance between them on the map is 3 cm? 300 km

100 km

3 km

30 km

If the ratio of the width to the length of a rectangle is 1:2 and the length is 20 cm, what is the width? 10 cm

20 cm

40 cm

5 cm

If there are 4 apples for every 6 oranges in a fruit basket, what is the ratio of apples to oranges? 2:3

3:4

1:2

4:6

A drawing uses a scale of 1 inch to 3 feet. If a wall in the drawing is 2 inches long, how long is the actual wall? 6 feet

3 feet

9 feet

12 feet

A photograph is enlarged to twice its original width and height. What is the ratio of the area of the enlarged photo to the original? 4:1

2:1

1:4

1:2

To maintain a balanced diet, the ratio of fruits to vegetables should be 3:4. If you eat 12 fruits, how many vegetables should you eat? 16 vegetables

8 vegetables

12 vegetables

9 vegetables

In a recipe, the ratio of cups of flour to cups of sugar is 2:1. If you use 4 cups of flour, how many cups of sugar do you need? 2 cups

3 cups

1 cup

4 cups

A rectangle has a length of 10 cm and a width of 5 cm. What is the ratio of the width to the area of the rectangle? 1:10

1:2

1:20

1:50

For every 5 red beads, there are 15 blue beads. What is the ratio of red beads to the total number of beads? 1:3

1:4

2:5

3:4

In a class, the ratio of students wearing glasses to those not wearing glasses is 1:4. If there are 20 students in the class, how many are wearing glasses? 4 students

15 students

5 students

10 students

The ratio of boys to girls in a class is 3:2. If there are 15 boys, how many girls are there? 10 girls

20 girls

15 girls

5 girls

A model airplane has a wingspan of 18 cm. If the actual airplane has a wingspan of 36 metres, what is the scale of the model? 1:20

1:3

1:18

1:54

A scale model of a car is made at a scale of 1:24. If the actual car is 4.8 meters long, how long is the model? 20 cm

200 cm

24 cm

2 cm

A mixture requires a ratio of water to cement of 3:1. If you have 9 liters of water, how much cement do you need? 3 liters

6 liters

9 liters

12 liters

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