Question 1:

If one tire can hold 30 pounds of air, how many pounds of air can 8 tires hold?

Question 2:

A grocery store has 60 bags of rice. If each bag weighs 5 kg, how much is the total weight of all the bags of rice?

Question 3:

The recipe requires 12L 500 ml of flour. If each bag contains 1 L 250 ml of flour, how many bags are needed?

Question 4:

The shoe store has 200 pairs of shoes. There are 5 types of shoes and each type has the same number of pairs. How many pairs of shoes are there for each type?

Question 5:

The aquarium charges each child $7 of admission. If there are c children, the aquarium receives $49 for admission. Solve c.

Question 6:

In a factory, there are 15 machines and 45 workers. Each machine needs to be operated by 3 workers. If the workers are divided equally among the machines, how many workers are responsible for each machine?

Question 7:

There are 15 shelves in a library. Each shelf has 10 books on it and there is a bookend at each end of each shelf. How many bookends are there in the library?

Question 8:

A school has 15 classrooms. If each classroom has 20 students, how many students are there in total?

Question 9:

A pack of gum has 20 pieces. If there are 10 packs of gum in a box, how many pieces of gum are in the box?

Question 10:

There are 12 classrooms in a school. Each classroom has 20 desks and there is a pencil holder on each desk. How many pencil holders are there in all the classrooms?

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Answer Keys

Question 1: 8 tires can hold 240 pounds of air.

Question 2: The total weight of all the bags of rice is 300 kg.

Question 3: Ten bags are needed.

Question 4: 40

Question 5: 7

Question 6: 3

Question 7: 30

Question 8: 300

Question 9: There are 200 pieces of gum in the box.

Question 10: 240

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Solutions

Question 1
To solve this problem, we need to multiply the capacity of one tire (30 pounds of air) by the number of tires (8). So, 30 x 8 = 240. Therefore, 8 tires can hold 240 pounds of air.

Question 2
To find the total weight, multiply the weight of one bag by the number of bags. Therefore, the total weight of all the bags of rice is 5 kg * 60 = 300 kg.

Question 3
Convert both quantities to ml: 12L 500 ml = 12,500 ml. Each bag contains 1 L 250 ml = 1,250 ml. Divide 12,500 ml by 1,250 ml to get 10 bags.

Question 4
To find the number of pairs of shoes in each type, divide the total number of shoes by the number of types. 200 divided by 5 equals 40. Therefore, there are 40 pairs of shoes for each type.

Question 5
Since each child pays $7, we can set up an equation: 7c = 49. To solve for c, we divide both sides by 7: c = 7.

Question 6
The total number of workers available is 45 and the number of machines is 15. If each machine is operated by 3 workers, then the total number of workers required is 15 x 3 = 45. Since the workers are divided equally among the machines, 3 workers are responsible for each machine.

Question 7
To find the number of bookends in the library, we need to multiply the number of shelves by the number of bookends on each shelf, and then multiply the result by 2 (since there are two bookends on each shelf). So, 15 x 2 x 1 = 30. Therefore, there are 30 bookends in the library.

Question 8
To find the total number of students, we need to multiply the number of classrooms by the number of students in each classroom. So, 15 multiplied by 20 equals 300. Therefore, there are 300 students in total in the school.

Question 9
To solve this problem, we need to find the total number of gum pieces in 10 packs. We can do this by multiplying the number of pieces in one pack (20) by the number of packs (10). So, 20 x 10 = 200. Therefore, there are 200 pieces of gum in the box.

Question 10
To find the total number of pencil holders in all the classrooms, we need to multiply the number of classrooms by the number of desks per classroom and then by the number of pencil holders per desk. So, the solution is: 12 x 20 x 1 = 240.