Find a Quiz on Ratios

The ratio of boys to girls in 6th grade is 3:2. If there are are 45 boys in 6th grade, how many girls are there?

• 44

• 30

• 15

• 50

Ratio Tables are Equivalent Ratios?

• True

• False

To extend a ratio or create an equivalent ratio, you must multiply or divide by the same number on both sides.

• True

• False

A soup that serves 16 people calls for 4 cups of chicken broth. How many cups of chicken broth would you need to make an identical recipe that serves 8 people?

*Use a ratio table to find the answer*

• 1 cup

• 4 cups

• 2 cups

• 6 cups

If the ratio of cats to dogs is 3:4, how many cats are there if there are 20 dogs?

• 15 cats

• 25 cats

• 30 cats

• 10 cats

If the ratio of pencils to pens in a box is 7:5, how many pens are there if there are 21 pencils?

• 15

• 18

• 12

• 14

Answer explanation

To find the number of pens, set up fractions as an equality like this: 7/5 =21/x. 7*3 is 21, so multiply the 5 by 3 as well to get the number of pens, 15.

If the ratio of cats to dogs in a pet store is 3:4, and there are 12 cats, how many dogs are there?

• 16

• 14

• 18

• 20

If the ratio of boys to girls in a class is 5:6 and there are 30 girls, how many boys are there?

• 25

• 20

• 24

• 28

If a recipe calls for a ratio of 2 cups of flour to 3 cups of sugar, how many cups of sugar are needed if 8 cups of flour are used?

• 6

• 10

• 12

• 14

What is the ratio of 30 minutes to 2 hours?

• 1:4

• 1:2

• 15:1

• 1:8