Maths practice for 12-year-olds - page 243 of 351
Number of problems found: 7018
- School 6127
The gym at the school is 12 m wide and 1800 cm long. Draw it on a scale of 1:500 - Strawberries 6125
Friends Marika and Katka decided to prepare strawberry jam together according to the recipe. They needed 50g of sugar for 0.5kg of fruit. How many kilograms of sugar must the friends prepare if they make jam from 2.3 kg of strawberries? - Calculate
Calculate the area cm² diamond with a side length of 9.8 cm and a height on the side of 5 cm. - Naturally 6121
The ratio of the two natural numbers is 2:3. The smaller natural number from this pair is 12. Calculate the larger. - The well
The well has the shape of a cylinder with a diameter of 2 m. From ground level to water level are 4 meters, and the water depth in the well is 6 m. How many m³ of soil did they dig when digging a well? How many liters of water are in the well? - How much
How much money will we pay for 20 planks 4m long, 15cm wide, and 26mm thick when 1m³ of wood costs 4500kč? - Quadrilateral 6116
The area of a regular quadrilateral pyramid's mantle is equal to twice its base's area. Calculate the pyramid's surface if the length of the base edge is 20 dm. - Pool tiles
The pool is 25m long, 10m wide, and 160cm deep. How many m² of tiles will be needed on the walls and the pool? How many tiles are needed when one tile has a square shape with a 20cm side? How much does it cost when 1m² of tiles costs 258 Kc? - Rhombus 29
One of the diagonals of a rhombus is equal to a side of the rhombus. Find the angles of the rhombus. - Lecturers 6099
Three lecturers will create 75 tasks in two and a half days. In how many days will it take at least five lecturers to create enough exercises for the exercise book, which should contain 300 exercises? (we assume that all tutors are equally efficient and w - Map scale The rectangular plot has a scale of 1:10000 and an area of 3 cm² on the map. What area does this plot have on a 1:5000 scale map?
- Quarters 6097
How many times are the three halves larger than eighty percent of the three quarters? - Painters
Six of the painters paint 90 m of the fence in five hours. For how long would the four painters paint a 45-meter fence? How many meters of the fence were painted by painters 5 for two hours? - Available 6094
There are a total of 110 beds in the hotel, which are available in single, double, and triple rooms, while there are three times more triple rooms than single rooms and twice as many double rooms as triple rooms. How many triple rooms are there in total i - Minutes 6093
The tower clock delays only 55 minutes in an hour. It's noon, and the clock shows the exact time. What time will they show up after four hours? - Five-crown 6091
The customer paid the amount of CZK 3,200 with the same 100-crown, two-crown and five-crown banknotes. How many banknotes did he use to pay the amount if he paid precisely the amount? - Consecutive 6090
The sum of four consecutive even numbers is equal to 108. Which of the numbers is equal to the smallest of these summands? - Largest 6089
The largest number of small cubes with an edge length of 2 cm will fit in a large cube with a volume of 216 cm³. - Cuboid
The sum of the lengths of the three edges of the cuboid that originate from one vertex is 210 cm. The edge length ratio is 7:5:3. Calculate the length of the edges. - Playing
How long have we trained on the pitch when we know that the warm-up took 10 minutes, we trained passes for one-third of the time, and we played football half the time?
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