Maths practice for 11-year-olds. - page 16 of 226
Number of problems found: 4520
- Calculate 258
Calculate the volume and surface area of a prism with a trapezoidal base and a height of 9 cm. The base is an isosceles trapezoid with parallel sides of 3 cm and 6 cm, legs of 2.5 cm, and a height of 2 cm. - Cake 3
A cake weighs 2 3/5 kg. What is the total weight of 8 such cakes? - With fractions
Evaluate the following expression with fractions and brackets: 2 × (1/3 + 2/5) − 3/5 - Calculate the density
Calculate the density of a body with a mass of 6.5 kg and a volume of 0.01 m³. - At night
On the night from Thursday to Friday, the temperature dropped to −7 °C. On Friday at noon, the temperature rose by 13 °C, and in the evening, the temperature dropped by 11 °C. What did the thermometer show on Friday evening? - Asphalt - rolling
A road roller has a diameter of 80 cm and a width of 1.2 m. How many square metres of road does it roll if it makes twenty full rotations? - Meat 5
2.4 kg of meat costs 292 CZK at the store. How much meat of the same type can be bought for 2,482 CZK? - Quarter of some number
A quarter of an unknown number, increased by one hundred, equals fifty. What is the unknown number? - Third angle
What is the third angle of a triangle if the first two angles are 50° and 60°? - Salad - delicacy
A customer paid €1.50 for 300 g of salad. How much will they pay for 500 g of the same salad? - Calculate 423
Calculate the volume and surface area of a cylinder with a height of 40 dm and a base diameter of 3 m. - A fraction of an hour
Calculate in minutes: 2/3 of 5 hours. - Perimeter 37
The perimeter of a square is 18. What is the length of its side, and what is its area? - In the kitchen 2
In a kitchen measuring 3 m × 2 m, we want to lay square tiles with sides of 20 cm on the floor, placed right next to each other. If there are exactly 40 tiles in one package, how many packages do we need to buy to cover the entire kitchen? - Running race
A running race consists of two stages. Two thirds of the competitors completed the first stage, and only three quarters of those completed the second stage. Only 12 competitors reached the finish line. Determine how many competitors started and how many d - Wands - Wizard
The number promised the wizard Rhododendron that she would teach him a lot about numbers, but he must first solve her riddle: My two magic wands measure 63 cm together. One is 7 cm longer than the other. How long are the wands? - Trainers 3
Groups of trainees are arranged in rows of six, eight, nine, and ten. Each time there is one trainee left over. How many trainees were there? - Number 17
The number of boys in the class is k and the number of girls is m. How many euros will the class treasurer collect from them for a theatre performance if one ticket costs €4.25? - A sixth of a million How much is 2/6 of $10,000,000?
- Asphalt - road
2,933 kg of asphalt is how many m³? Use the density of asphalt as 2,400 kg/m³. Note: Natural asphalt (bitumen): 1,010–1,050 kg/m³ Asphalt mixture (for roads): 2,200–2,500 kg/m³ (Contains mineral aggregates, so it is denser.)
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