Maths practice for 12-year-olds - page 194 of 357
Number of problems found: 7140
- Measuring 14343
The town square has the shape of a square measuring 510 meters. What is the size of this square? - Trolleybuses 14313
Trolleybuses on different lines depart from the same terminal station at 4:10 in the morning. The first returns to the final station regularly in 1 hour, the second in 40 minutes, the third in 2 hours, and the fourth in 1 hour and 20 minutes. At what time - Square-shaped 14271
We should sow grass in a square-shaped garden with a side of 16.2 m. How many kg of grass seed do we need? One square meter is necessary for 25 grams. - Perimeter of the circle
Calculate the perimeter of the circle in dm, whose radius equals the side of the square containing 0.49 dm². - A square base
A solid right pyramid has a square base. The base edge length is 4 centimeters, and the pyramid's height is 3 centimeters. What is the volume of the pyramid? - One-sixth 14133
Subtract one-sixth of this unknown number from three times the unknown number, and you get the number 17. Calculate the unknown number - Quadrilateral 14093
The tent has the shape of a mantle of a regular quadrilateral pyramid with a base edge of 3.5 meters and a height of 2.4 meters. How many cubic meters of air does it contain?
- Possible lengths
Find the possible lengths for the third side of a triangle with sides 20 and 18. - Probability 13973
Three types of pinwheels are on the tray: two caramel, four coffee, and one vanilla. Jurko chose one dessert. What is the probability that he decided on a coffee pinwheel? - The tourist
The tourist has walked 3/4 of the route. The destination is 12.5 km away. How many kilometers did the route measure? - Everyone 13843
The orchard measures 24.6 meters x 70 meters. How many trees can we plant in it if everyone needs at least 12 square meters? - Cyclists 13831
Two cyclists left one place on the circuit facing each other. The first drove at a speed of 32 km/h, and the second at 28 km/h. How long was the circuit if the cyclists met in 5 minutes? - Share of a land
It is a plot of land with an area of 10427 square meters. If I own a share of 412776/118290415 of that land, how many square meters do I own? - Newspapers 13781
Ten machines produced newspapers in 18 hours, and two machines rang for 2 hours. Thus, the production took 18 hours. - Rectangular 13731
I have a rectangular trapezoid ZIMA (the right angle at the top of Z. ZIMA = winter in English) ZI-7cm, ZM-5cm, AM-3.5cm, and I have to write the procedure and perform a test in the design task
- Christmas or Easter
Please calculate this example by the Venn equation. They asked 73 students whether they liked Christmas or Easter. Thirty-four of them like one of the holidays. 39 loves Easter. There are twice as many students who wish for both holidays as those who only - Dimensions 13671
How high does a prism with the dimensions of the base 1.7 dm and 5 dm reach if it fits 1032 dm³? - Trapezoid 13661
The trapezoid area is 40.8 cm². Calculate the height of the trapezoid if the base is 5.5 cm long and 4.7 cm long. - Twenty-five
How many are three-digit natural numbers divisible by 25? - Five-crown 13621
Jana saves two-crown and five-crown coins. He has ten coins in the coffers. How many are two Czech crowns, and how many are five Czech crowns if he has saved CZK 29?
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