Maths practice for 11-year-olds. - page 21 of 213
Number of problems found: 4252
- Glass vessel
The cylinder-shaped glass vessel is 1 m high and has a volume of 196.25 l. Calculate the diameter of the container. - Cylindrical column
What is the mass of a reinforced concrete cylindrical column with a radius of 30 cm and a height of 4.5 m if the density of reinforced concrete is 2400 kg/m³? Round the result to whole kilograms. - Water Flow Rate
In one minute, 3 and 1 and a half liters of water flow out. How many liters of water will flow out in 2 and 1 half minutes? - Sheet metal troughs
A farmer orders sheet metal troughs from a tinsmith for watering calves on pasture. The tinsmith looks at a drawing of the trough and estimates how much sheet metal will be needed for one trough. Determine the sheet metal consumption, adding 15% for waste - Sand pedestal
The pedestal under the giant billboard is a prism-shaped steel plate structure filled with sand. How much sand will it fit, and what is the area of the plates used? We can neglect their thickness. The dimensions are 1 m*4 m*90 cm. - Posters on Cone
The stand on which the posters are stuck has the shape of a cone. It is 2.4 m tall. The side of the cone is 2.5 m long. How many 40cmx60 cm posters can be stuck on the stand so they do not overlap? - Positive or Negative Pressure
The total pressure in the container is 5 MPa. Is there negative or positive pressure in the container (write the answer as A or B)? - Telegraph poles
How much wood was used to make 200 telegraph poles 6 m high and 15 cm in diameter? - Diameter - tent
The cone-shaped tent is 3 meters high. The diameter of its base is 3.2 m. How many m³ (cubic meters) of air are in the tent? - Timetable 2
A train runs on a regular schedule from city A to city B, 270 km away, in 3 hours. On Monday, the train left city A 18 minutes late, but arrived in city B on schedule. By how many km/h was the average speed of the train on Monday higher than the scheduled - Finding the Number
If I subtract 3/5 from it, I get 2/5. What number do I think? - Product 3DN
How many three-digit numbers are there whose product of digits is 5? - Yard Length from Area
Calculate the length of a yard with an area of 9.5 ares if its width is 16 meters. - Paint the walls
It is necessary to paint the walls and ceiling of the warehouse, which is 10 m long, 4 m wide, and 3 m high. How many CZK (Czech crowns) will it cost to paint if it costs 200 CZK to paint 1 m²? - Parallelogram Angles
In a parallelogram, ABCD, the angle at vertex B is 108°. What is the angle size at the vertex D? - Finishing Tasks Earlier
Nine-year-old Lucia is preparing for testing. He solves a collection of 40 tasks per day. He will need 9 days to solve all the tasks. How many days earlier would she finish if she solved 60 tasks a day? - Paint for Pool Perimeter
The swimming pool is 25 m x 12 m. The safety coating around the perimeter needs to be restored. One can of paint is enough to paint 15 m. How many cans of paint should be bought? One can cost 300 Sk. How much SK will we pay for the paint? - Deciliters - balls
We placed 10 layers of 100 balls with a diameter of 1 cm in a cube-shaped aquarium with an inner edge length of 10 cm. How many deciliters of water could still fit in the aquarium? - Egg Laying Rate
One and a half hens laid one and a half eggs in a day and a half. How much will six hens lay in seven days? - Protectors
Nature conservationists pledged to clean the section of a stream belonging to their municipality. On Saturday, they cleaned one quarter of the total length of the stream, and on Sunday, 1.5 km, so that over the weekend they cleaned a total of 4 km. What i
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