Ratio and Proportion

What is the ratio of 15 to 45?

• 1:3

• 1:2

• 3:1

• 1:5

If a recipe calls for 2 cups of flour to 3 cups of sugar, what is the ratio of flour to sugar?

• 2:3

• 3:2

• 1:1.5

• 5:2

In a class, the ratio of boys to girls is 4:5. If there are 20 boys, how many girls are there?

• 30

• 35

• 40

• 25

Which of the following pairs of ratios are equivalent?

• 1:2 and 2:3

• 3:4 and 6:8

• 5:10 and 1:4

• 2:5 and 3:8

A car travels 180 miles on 6 gallons of gasoline. What is the ratio of miles traveled to gallons used?

• 36 miles/gallon

• 18 miles/gallon

• 30 miles/gallon

• 24 miles/gallon

If the ratio of red marbles to blue marbles in a bag is 3:5 and there are 40 blue marbles, how many red marbles are there?

• 12

• 30

• 20

• 24

• 6

• 8

• 12

• 16

Which of the following statements is true about the ratios 7:9 and 14:18?

• They are not equivalent

• They are equivalent

• 7:9 is greater than 14:18

• 14:18 is less than 7:9

A map has a scale of 1:100,000. If two cities are 50 km apart in real life, how far apart are they on the map?

• 0.5 cm

• 5 cm

• 50 cm

• 500 cm

If 5 apples cost $3, what is the cost of 15 apples?

• $ 6

• $ 7.50

• $ 9

• $ 10