Maths practice for 11-year-olds. - page 108 of 222

Number of problems found: 4427

Originally 22951
The tank originally had 7 m³ of gasoline. We gradually pumped out 3hl, 3000dm³, and 700 liters of gasoline. How many liters of petrol is left in the tank?
Millimeters 22911
The rectangular garden is 40 meters long and 35,000 millimeters wide. How many meters of fencing does the landowner need? How much will it cost for him if 1 meter costs 5 euros?
Distance 22891
The cities of Košice and Prešov are 39.5 km apart. What will be their distance on a map with a scale of 1:5000000?
Numbers and digits
How many digits are in the numbers 1 to 100?
Rectangular 22761
We will pave a square plot of land from rectangular tiles with 25 cm and 30 cm dimensions. What is the smallest square plot we can pave with these tiles without cutting them?
Combined 22681
The farm keeps cows, horses, and sheep. There are 37 cows, which is 25 more than the sheep. There are seven times fewer horses than cows and sheep combined. How many animals do they keep on the farm together?
Volume and surface area
Find the volume and surface of a wooden block with dimensions: a = 8 cm, b = 10 cm, c = 16 cm.
Planet Earth
What is the weight of the planet Earth if its average density is ρ = 2.5 g/cm³?
Library
We purchased new books for the library. Five-eighths were professional books, one-fifth were encyclopedias, and 231 books were dictionaries. How many professional books were there?
What is bigger?
Which ball has a larger volume: a football with a circumference of 66 cm or a volleyball with a diameter of 20 cm?
Flowerbed 22573
Around a round flowerbed with a diameter of 6m should be made a sidewalk with a width of 0.5m. How many square meters of material do we need?
Calculate 22533
Calculate the weight of the cube, which is made of wood with a density ρ = 0.725 g / cm, the edge of the cube is 32 cm,
Cuboid - box
The box has the shape of a cuboid with dimensions of 5 cm and 30 mm. Calculate the box's height if the cuboid's volume is 0.60 dm³. Calculate the surface area of the box. (calculation of height from the volume, calculation of area from the formula, keep
The angles ratio
The angles in the ABC triangle are in the ratio 1:2:3. Find the angles' sizes and determine what kind of a triangle it is.
Equation with one variable
Solve the following equation with one unknown: 5(7s + 5) =130
Identical 22233
They will compete on four stages in 8 hours by 42 meters more than on twenty identical stages per hour. How many meters of fabric are woven per hour in one state?
Net of a cube
We can fold this net to form a cube with a side length of 20 units. What is the surface area of the cube in square units?
Cylindrical 22193
The pool is cylindrical, with a diameter of 3.6 meters and a depth of 1.2 meters. How long will it be filled when 2 liters of water flow in 1 second?
Water tank
300 hl of water were filled into the tank 12 m long and 6 m wide. How high does it reach?
Chestnuts
Three divisions of nature protectors participated in the collection of chestnut trees. 1. The division harvested 1250 kg, the second division by a fifth more than the first division and the third division by a sixth more than the second division. Thus, th

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