Maths practice for 12-year-olds - page 157 of 352
Number of problems found: 7028
- Trapezoid land price
The land on which the car service stands is shaped like a trapezoid with bases 98 m and 76 m long. The distance from the bases is 64 m. Calculate the price of the land; if 1 m² of land costs 14 €? - Thousandths
If you have a number 0.08, what is the form in thousandths? - Book money
Jarmila bought a book for two-fifths of her money, leaving her with CZK 75. a) How much CZK did Jarmila initially have? b) How much did the book cost? - Class language
Five-twelfths of the students in the class learn English, a third learn German, a sixth learn French, and two students learn Spanish. How many students are in the class, and how many languages are they learning? - Cone paper
Pepíček went to school on the first day. Dad made him a paper cone for sweets in the shape of a cone with a side length of 50 cm and a base radius of 10 cm. How many cm² of paper did he need to make the cone? - 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. - Oak seat cutting
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? - Worker floor time
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. - Sidewalk paving time
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? - Pool tile
The pool in the New Garden is 2 meters deep. It has a block shape with bottom dimensions of 10 m and 15 m. 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? - Ondra money
Dale asks Andy: 'Andy, how many crowns do you have?' Andy replied: "If I added another CZK 200 to my money, I would have six times as many as now." How many crowns does Andy have? - Triangle angle
In a right triangle, one acute angle is 20° smaller than the other. Determine the size of the interior angles in the triangle. - Towel drying time
Before the holiday, Mom bought 2 towels measuring 90 cm x 120 cm, 4 towels measuring 70 cm x 100 cm, and 3 small towels measuring 40 cm x 60 cm. They were all made of the same material. She washed them at home and left them to dry on the balcony. How long
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