Ratio Story Problems

Solve the following real-world problem using ratio and rate reasoning: If 5 workers can build a house in 8 days, how many workers are needed to build the same house in 4 days?

• 15 workers

• 3 workers

• 10 workers

• 20 workers

Solve the following ratio problem using a table: A recipe calls for 2 cups of flour and 3 cups of sugar. If you want to make half the recipe, how much flour and sugar do you need?

• 1 cup of flour and 1.5 cups of sugar

• 1.5 cups of flour and 2 cups of sugar

• 3 cups of flour and 2 cups of sugar

• 2 cups of flour and 3 cups of sugar

Explain how you can use ratio reasoning to solve a problem involving the ratio of boys to girls in a classroom if there are 18 boys and 24 girls.

• 1:2

• 10:12

• 5:6

• 3:4

If a recipe calls for 2 cups of flour and 3 cups of sugar, and you only have 1 cup of flour, how much sugar do you need to maintain the same ratio?

• 2 cups

• 1.5 cups

• 3 cups

• 4 cups

A recipe calls for 2 cups of flour for every 3 cups of sugar. If you want to make a half batch, how many cups of flour do you need?

• 1

• 1.5

• 2

• 3

Use ratio language to describe the relationship where for every 5 red marbles, there are 7 blue marbles.

• There are 5 red marbles for every 7 blue marbles.

• The ratio of red marbles to blue marbles is 5 to 7.

• Both A and B

• None of the above

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

• 15

• 14

• 13

While preparing for a triathlon, Janecia swims 8 minutes for every 20 minutes she bikes.  If she swims 72 minutes, how long does she bike for?

• 180 minutes

• 144 minutes

• 92 minutes

• 80 minutes

In a survey, the ratio of people who prefer tea to those who prefer coffee is 4:5. If 180 people were surveyed, how many prefer tea?

• 80

• 72

• 90

• 100

In Houston, Texas 6 birds ate 30 grams of worms in one night. At this rate, how many grams of worms could 98 birds eat in one night?

• 490

• 19.6

• 134

• 580