Maths practice for 12-year-olds - page 150 of 350
Number of problems found: 6985
- He tile
The tile has the shape of an isosceles triangle, the base of which is 4 cm long, and the corresponding height is 6 cm long. At least how many tiles are needed to cover a wall containing 2.4 m² - Cube-shaped box
The cube-shaped box is filled to the brim with 2 liters of milk. Calculate the box's edge and surface area. - Fireplace 39711
The cottager, Mr. Winter, wants the lower part of the trunk of a felled oak, which has a length of 2.25. cut new seats for the fireplace. Each seat will be a log with a height of 0.4 m. How many will Mr. Winter cut in total? - The garden
The garden is an isosceles trapezoid with bases 64 m and 24 m long and a height of 25 m. If a fifth of the area is occupied by a cottage, lawn, and path, in what garden area is it possible to grow vegetables? - Hemispherical dome
What is the coverage area of the painting of a hemispherical dome with a diameter of 8 m? - Together 39671
Three workers were to lay the parquet floor. If everyone worked alone, the first would finish the job in 30 hours, the second in 24 hours, and the third in 20 hours. How long will they do the floor if they work together? - Unknown number
If we subtract three from the unknown number, we get just as much as if we subtract seven from the unknown number and we multiplied the result by 2. - 20-meter-long 39603
Two workers will pave a 20-meter-long sidewalk in 5 days. Determine how long it would take to pave the sidewalk: a) 4 workers b) 5 workers c) 10 workers - Together
The three friends divided the balls in a ratio of 6:5:4. Some two got 126 balls. How many balls were there together? - Dimensions 39561
The pool in the New Garden is 2 meters deep. It has a block shape with bottom dimensions of 10m and 15m. How many square tiles did they use to line the pool inside? - The perimeter
The triangle has one side 5 cm long and another 11 cm long. What can be the smallest, and what is the largest perimeter? - Find unknown number
What is the number between 50 and 55 that is divisible by 2,3,6,9? - Replied: 39523
Dalibor asks Ondra: 'Ondra, how many crowns do you have?' Ondra replied: "If I added another CZK 200 to my money, I would have six times more than now." How many crowns does Ondra have? - Determine 39503
In a right triangle, one acute angle is 20° smaller than the other. Determine the size of the interior angles in the triangle. - Measuring 39453
Before the holiday, Mom bought 2 towels measuring 90cm x 120cm, 4 towels measuring 70cm x 100cm, and 3 small towels measuring 40cm x 60cm. They were all made of the same material. She washed them at home and left them to dry on the balcony. How long did i - Approximately 39443
On the map of Bratislava, with a scale of 1:200,000, the length of the river Danube is about 12.3 cm. Approximately how many km of Danube flows through this area? - Producing books
How many m² of paper is needed to produce a book with 200 pages when one page is 24 cm and 15 cm? - Transported 39423
A maximum of 15 people can fit into one cabin on Lomnický štít. The cable car runs every 20 minutes, and the journey takes 15 minutes. In the shortest time, can 52 ninth graders there on a trip be transported to Lomnický štít? - Michal 39413
How many steps will Michal take to reach the school 61.10 m away if each step is 13/20 m long? - Natural 39393
What is the sum of all natural numbers less than 100 that are the power of 4?
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