Maths practice for 12-year-olds - page 307 of 350
Number of problems found: 6996
- Including 2753
Martina helped the coach write diplomas. It took her 3 minutes to write her first diploma and her next 2 minutes. How many minutes will it take her to write n = 14 diplomas/including the first/if she works at this pace? - Simonka 2752
Is Simona right if she says that an iron cube with an edge length of 10 cm is heavier than a pound (1 cm³ of iron weighs 7.25 g)? - Cube-shaped 2751
What weight will a cube-shaped concrete base with an edge length of 10 m have if one concrete cube weighs 2200 kilograms? - Recommended dimensions
Michael bought an aquarium in the shape of a block with dimensions of the bottom 30 cm x 15 cm and a height of 20 cm. The salesman recommended that he fill the aquarium with water only up to a height of 15 cm. How many liters of water does Michael have to - Measuring 2747
We poured 1 liter of water into an aquarium measuring 20 cm x 20 cm and 25 cm high. How high does the water in the aquarium reach? - Snails
How many liters of water will fit in an aquarium with bottom dimensions of 30 cm and 25 cm and a height of 60 cm if we pour water up to a height of 58 cm? How many snails can we keep in an aquarium if we know that snails need 600 cm³ of water for their li - Original 2739
Dresses on sale have become cheaper twice: first by 12%, then by 25% of the new price. What% of the original price was the final price? - Diagonal 2738
ABCD square has a diagonal length of 8 cm. What is the area of the square? - 15-meter-long 2735
The swimming pool also has a 15-meter-long pool 8 meters wide with a constant depth of 2 meters. If it is always filled 10 cm below the edge, how many hectoliters of water can fit in it? - Participant 2734
Each participant on the school trip has to pay € 7 for the booked bus. Three students fell ill and did not go on a trip. Everyone then had to pay € 8 for the bus. How many students took part in the trip? - Diameter 2733
If we cut a tree trunk with a diameter of 42 cm and the width of the cutting joint is 3 mm, how many cubic cm of wood will turn into sawdust? - Two-fifths 2731
Barbora has already read 144 pages of the book. She has yet to read two-fifths of the pages of the entire book. How many pages does the whole book have? - Consumption 2729
The car's average consumption is x = @ x liters of gasoline per 100 kilometers. How much petrol does a car use on a 320-kilometer road? - Rectangular garden
How many m² (square meters) is a rectangular garden if a = 21 steps and a wide b = 41 steps are long, with the length of one step being, on average, 3/4 (three quarters) meters? - Ascent 2725
If the road has an ascent of 8%, does that mean it will climb by 200 m? - Cents no more
Janko bought pencils for 35 cents each. Neither he nor the salesperson had small coins, just a whole € 1 coin. At least how many pencils did he have to buy to pay for the whole euros? - There 2723
There are three times as many geese as hares on the farm. They have a total of 60 feet. How many geese are on the farm? - Dimensions 2720
The cabinet has the shape of a cuboid, the dimensions of which are 80 cm and 55 cm, and a height of 1.8 m. The cabinet is painted twice on the outside. How much paint is used to paint the cabinet if 1kg is enough for 4 m²? (we do not paint the bottom of t - Room dimensions
The room dimensions are 5m and 3.5m, and the height is 2.85m. Paint the room (even with the ceiling). There will be two layers. Doors and windows have a total of 2.5 m². One box of paint is enough for 6 m². How many boxes of paint are needed? How much do - Dimensions 2717
We will paint a block-shaped pool with 25m and 15m bottom dimensions and a depth of 3.5m. How much € will we pay for painting if we paint twice? One kilogram of paint is enough for 5m² of paint; we will pay €3.5 for 1kg of paint, and we have to pay the pa
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