Math practice for 13 year olds - page 217 of 415
Number of problems found: 8281
- 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 legs is twice the length of the other. Find the lengths of its legs. - Reducing
Reducing the unknown number by 427, we get 65% of its value. What is an unknown number? - 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 leg 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? - Cube edge calculation
What is the edge size of a cube with an area of 37.5 m²? - The surface area How much percent will the surface area of a 4x5x8 cm block increase if the length of the shortest edge is increased by 2 cm?
- Concentric circle construction
Construct three concentric circles k, l, m with center at point S and with radii 2 cm, 3 cm, and 40 mm - Trapezoid perimeter calculation
Find the points A1 B1 symmetric along the y-axis to the points A [-4,0] and B [-1,4]. Calculate the perimeter of the trapezoid AB B1 A1. - Seat fabric calculation
How much fabric will be needed to cover a cylinder-shaped seat with a diameter of 0.8 m, 0.6 m high (rounded up to whole square meters) - Roller coverage area
The roller on the tennis court has a diameter of 60 cm and is 1.2 m wide. What area will the roller cover in one turn? They rounded to one decimal place. - Cylinder volume comparison
The cylinder has a volume of 200 liters. What is the volume in liters of a second cylinder twice as wide and half-height? (π = 3.14)
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