Direct and Indirect Proportions

If 15 men can do a work in 12 days, how many men will do the same work in 6 days?

• 30

• 25

• 15

• 8

15 men can build a wall in 42 hours, how many workers will be required for the same work in 30 hours?

• 21

• 20

• 13

• 23

A recipe requires 4 cups of sugar to make 8 cookies. How many cups of sugar will be needed to make 24 cookies?

6 cats eat 1 kg of fish. How many kilograms of fish do you need to feed 18 cats?

• 18 kg

• 12 kg

• 6 kg

• 3 kg

3 workers build a wall in 12 hours. How long would it have taken for 6 equally productive workers?

• 6

• 12

• 36

• 48

It takes 14 hours for a faucet with a flow of 18 liters per minute to fill a reservoir with water. How long will it take if its flow is reduced to 7 liters per minute?

• 32

• 14

• 36

• 24

If 35 men can reap a field in 8 days; in how many days can 20 men reap the same field?

• 35

• 7

• 28

• 14

8 cows can graze a field in 28 days. How long would 4 cows take to graze the same field?

• 48

• 56

• 36

• 40

If 32 men can reap a field in 15 days, in how many days can 20 men reap the same field?

• 24

• 32

• 48

• 36

12 men can dig a pond in 8 days. How many men can dig it in 6 days?

• 20

• 15

• 16

• 24