Maths practice for 11-year-olds. - page 31 of 224

Number of problems found: 4468

The mesh
How many m² of mesh is used for fencing a square-shaped cage without a base with dimensions of 25m, 18m, 2.5m?
Resulting cross
From the corners of the square with a side length of 10 cm, we cut out small squares with a side length of 3 cm. What is the area of the resulting cross?
Satellite 81495
The satellite flies at a speed of 8 km/s. Will it fly down the runway in two seconds?
Approximately 81476
Approximately how many square meters of paper are needed to make a 500-page book that measures 29.7 cm by 21 cm (printed on both sides of the paper).
Perimeter 81458
Find out if a square with a perimeter of 12 CM has an area greater than 12 cm²
Simultaneously 81403
Cars left two places 520 km apart simultaneously at speeds of 30 km/h and 50 km/h. Where and when will they meet?
Process 81358
Teo went around the pool twice. He took 160 steps in the process. He took 25 steps along the length. How much area does the pool take up, and how long is Tro's stride? 0.5m?
Inventory of bottles
Determine the standard inventory of mineral water bottles for smooth operation if the restaurant needs 18,000 half-liter bottles per year. The delivery cycle of goods is 14 days. The minimum insurance stock is set at 5 days. How many liters of mineral wat
Cube-shaped 81332
The gardener collects rainwater in a cube-shaped container with an edge length of 80 cm. How many 16-liter buckets will he fill with water from a full reservoir?
Travels 81320
The car travels from Prague to Brno at a speed of 80 km/h and still has 15 minutes to drive. How far is it from Brno?
Indistinguishable 81236
There are 32 red socks and 32 blue socks in a drawer. The left and right socks are indistinguishable. You pull your socks out of the drawer in the dark. How many do you have to take out to make sure you have a pair when you look at them?
Production 81205
How many figurines can a potter make from 133 1/3 kg of clay if he needs 4/15 kg of clay to make one and 1/20 of the material is wasted during production?
Twenty-five 81187
Twenty-five prizes are drawn in a raffle with 500 tickets. How many tickets do we need to buy to ensure I win at least 3 prizes?
Difference 81141
Calculate the difference between the sum and product of the numbers -7 and -2.
Cubes 81088
How many cubes with an edge of 1 cm fit into a cube with an edge of 1 m?
Cubes 81080
How many cubes with an edge of 1 mm fit into a cube with an edge of 1 cm?
Three fractions times
Eight thirds×nine quarters×twelve fifths
Determine 81038
Determine the width of a rectangle with an area of 14.5 cm square and a length of 5 cm.
Rectangle pool
The cube-shaped pool is 50 m long and 16 m wide. They poured 12,000 hl of water into it. Calculate the surface area of the pool that is wetted by water.
Smaller 81015
Divide the area S=153 m² of the square garden in a ratio of 2:7. What part of the garden does the smaller part occupy?

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