Math practice for 13 year olds - page 218 of 428
Number of problems found: 8556
- The bakery
The bakery delivered 60 kg of bread to the store. The bread weighed 1 kg and 2 kg, a total of 35 pieces. How many loaves weighed 1 kg, and how many were two-kilo loaves? - Coal supply duration
With the consumption of 0.4 t of coal per day, the supply lasts for 36 days. How many days will the supply be enough if 16 kg of coal is used less daily? - Apple drying calculation
Last year, Mirek's aunt dried 4.8 kg of fallen apples from 30 kilograms of fallen apples. He wants to dry the crosses from 50 kilograms of apples this year. Approximately how many kg will he gain? - Backpack color distribution
They have two types of backpacks in the store. Blue is for 160 CZK, and red is for 180 CZK. They have 24 backpacks with a total value of CZK 4,120. How many blue and red backpacks do they have? - Business trip calculation
Thirty-five people took part in the business trip. They paid a total of €246. The journey price for employees was €6 and for a family member, €9. How many employees were on tour? I will also ask for the procedure. - Number calculation puzzle
A number twice less than y is 12 less than y. Determine the size of the number y. - Cinema ticket sales
The cashier at the cinema sells tickets for 50 CZK and 40 CZK. He has sold 143 tickets and earned a total of CZK 6,340. How many tickets did he sell? - Ski trip calculation
Adults and children, a total of 40 people, took part in the ski trip. The tour price was 140 CZK for adults and 60 CZK for children. A total of CZK 3,200 was collected. How many children and how many adults took part in the tour? - Crown coin exchange
The merchant exchanged CZK 1,000 (CZK is the Czech crown) for twenty and ten crowns in the bank. He had a total of 70 coins. How many crowns did he have? How many crowns did he have? - Rhine Danube length
The length of the Rhine is 3/7 the length of the Danube. Both together are 4000 km long. How long is each river? - Gibraltar Strait
The length of the Strait of Gibraltar is 1.5 times the length of the Bering Strait. The total length of both straits is 150 km. Find the length of each waterway. - Employee men percentage
Of the 800 employees, 344 are women. What percentage of the total number of employees are men? - Triangle branch length
The right triangle has an area of 225 cm². One of its branches is twice the size of the other. Find the lengths of its hangers. - Reducing
Reducing the unknown number by 427, we get 65% of its value. What is an unknown number? - Coffee machine coins Coins worth 20 cents and 50 cents are thrown into a coffee machine. There are 199 coins in the machine with a total value of € 68. How many are 20-cent coins in the machine?
- Sister money sharing
The two sisters are to share CZK 600. The younger should get one-eighth less than the older. How much CZK should each of the nurses receive? - Two rectangular boxes
Two rectangular boxes with dimensions of 5 cm, 8 cm, 10 cm, and second of 5 cm, 12 cm, and 1 dm will be replaced by a single cube box of the same cubic volume. Calculate its surface. - Triangle cathetus length
What is the length of the cathetus of an isosceles right triangle with an 8 cm long hypotenuse? Make calculations and procedures. - Ant food transport
Fifteen ants bring 10 g of food to the anthill in 1 hour. In how many hours will five ants carry 1 kg of food? - The largest
We cut the largest possible cylinder from a 20 cm cube. What is the volume of this cylinder?
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