Ratio Problems Quiz

If the ratio of boys to girls in a class is 3:4 and there are 28 girls, how many boys are there in the class?

• 21

• 24

• 18

• 36

A recipe calls for sugar and flour in the ratio 2:5. If you use 10 cups of flour, how many cups of sugar do you need?

• 4

• 5

• 20

• 25

In a bag of red and blue marbles, the ratio of red to blue marbles is 7:3. If there are 30 blue marbles, how many red marbles are there?

• 70

• 21

• 49

• 210

A mixture contains ingredients A and B in the ratio 5:2. If there are 14 grams of ingredient B, how many grams of ingredient A are there?

• 35

• 25

• 20

• 50

The ratio of the number of cats to the number of dogs in a pet shop is 4:7. If there are 21 dogs, how many cats are there?

• 12

• 24

• 28

• 16

In a fruit salad, the ratio of apples to oranges is 3:5. If there are 15 apples, how many oranges are there?

• 25

• 20

• 30

• 10

A group of friends share a bill in the ratio 4:3:5. If the total bill is $240, how much does the person with the largest share pay?

• $100

• $120

• $96

• $80

In a mixture of nuts and raisins, the ratio of nuts to raisins is 9:4. If there are 36 raisins, how many nuts are there?

• 81

• 72

• 45

• 90

A school's student to teacher ratio is 20:1. If there are 40 teachers, how many students are there?

• 800

• 400

• 1000

• 200

In a blend of coffee, the ratio of type A beans to type B beans is 5:3. If there are 24 kg of type B beans, how many kg of type A beans are there?

• 40

• 15

• 30

• 45