Maths practice for 11-year-olds. - page 100 of 224
Number of problems found: 4480
- Three-quarters of a tank
The oil tank is shaped like a cylinder with a height of 8 m and a diameter of 4 m. It is three-quarters full. How much oil is in it? - Beet harvest
Beet harvest is underway in the field. The beets are transported to 3 different processing plants by 3 trucks. One truck manages to return to the field 3 times in an hour, the second after 30 minutes, and the third has the shortest route, so it turns arou - Barrel paint calculation
How many kg of paint do you need to buy to paint a 1.5m high cylinder-shaped rainwater cover with a 0.7m radius? We paint the barrel from the outside and inside, and 100 grams of paint is needed to paint 1 square meter. - Floor varnish calculation
During the reconstruction of the apartment, Mr. Čakaj needed to varnish the floors in two rectangular rooms with dimensions of 6.8m x 4.5m and 6m x 3.8m. How many cans of paint did he have to buy if he painted 6m² of the floor with one can? - Height of the triangle
What is the height of the triangle with 7.8 cm² and the side a = 5.2 cm. (Calculation and procedure) - Digit sum calculation
Calculate the digit sum of 1 345 901 - Worker earnings calculation
Twelve workers earned 2,000 euros in 10 days. How many workers would 14 workers earn in 8 days? - Train tons
The entire loaded train weighs 760 tons. It has 30 wagons, each carrying 12 tons of grain and empty, weighing 10 tons. What is the weight of the locomotive? - Pool painting calculation We will paint the block-shaped pool, with the dimensions of the bottom a = 25 m and b = 15 m and the height c = 3.5 m. If one kg is enough for five square meters of paint, how many kg of paint will we need?
- Ice floe
What is the volume of an ice floe weighing 326 kg? The density of ice is only 920 kg/m³. - Independent variable
Separate the variable x1 and move all members of the mathematical notation: (2 x1+x2+x3)=3y+z to the other side. - Tank volume surface
The welded sheet metal tub is shaped a prism with dimensions of 6x2x2 m. How many m³ of water can fit in it, and what is its surface? - Number calculation puzzle
Nine times the number x is seven less than 160. Find the number x you are looking for. - Car motorcycle meeting
The distance is 77 km. A car at 100 km/h and a motorcycle at 80 km/h will run against him for half an hour. Later. When will they meet? - Circular park
The circular park has an area of 1600 m². Cross the park, right in its center, leads the trail. What is the length of the trail? - Number ratio sum
The two natural numbers are in the ratio of 3:13, and we will denote their sum. Which of the following values cannot its sum be? a) 64 b) 96 c) 112 d) 39 - The body
The body has 2 m, 2 dm, and 10 cm dimensions. It weighs 28 kg. What is its density? - Trip time shortening
A passenger car traveled the route from Trencin to Ruzomberok in 1 hour and 48 minutes. These two cities are 144 km apart. How many minutes would the driver shorten his return trip if he traveled an average of 90 km per hour? - Rectangular garden
The rectangular garden has a length of 48.7 m and a width of 6.3 meters shorter than the length. How much mesh should be bought for its fencing if the gate is 2.9 m long and the gate 1.1 m? What is the area of the garden? - Cube edges
The cube has an edge of 4 cm. It has the same volume as a block, the base of which has an area of 32 cm². What height is the block?
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