Proportions

2.

• 22.5

• 81

• 25.2

• 43.9

1.

• 13

• 16

• 18

• 21

4.

• 25

• 30

• 50

• 75

5.

• A

• B

• C

• D

Determine if the following pairs of quantities are proportional: (2, 3), (4, 6), (6, 9).

• Yes

• No

A bag contains red and blue marbles in the ratio 3:4. If there are 21 red marbles, how many blue marbles are there?

• 16

• 24

• 28

• 32

Determine if the following pairs of quantities are proportional: (2, 3), (4, 6), (6, 9).

• Yes

• No

A recipe calls for 2 cups of flour for every 3 cups of sugar. Which of the following is the correct ratio of flour to sugar?

• 2:3

• 3:2

• 1:1.5

• 1.5:1

In a survey, the ratio of people who prefer tea to those who prefer coffee is 3:2. If 120 people were surveyed, how many prefer tea?

• 48

• 72

• 80

• 90

A school's student to teacher ratio is 20:1. If there are 400 students, how many teachers are there?

• 10

• 20

• 40

• 80