Maths practice for 12-year-olds - page 105 of 355
Number of problems found: 7085
- Container salt edge
The cube-shaped container can hold precisely 8 cm³ of bath salt. How many cm³ of bath salt will fit in a cube-shaped container with an edge twice as long? - Gasoline canister price
My father refueled 40 liters of gasoline for 61.40 euros. He then refueled 8 liters of the same petrol into an empty canister. How many euros did gasoline cost in a canister? - Cylinder volume circumference
Calculate the volume of the cylinder if the circumference of the base o = 31.4 cm, height v = 6.4 cm - Cube surface volume
The ABCDEFGH cube (sketch it) has a debt edge of 5 cm. Calculate: a) ABFE wall area b) Area of the ADHE wall c) the surface of the cube d) Cube volume - Prism square base
The prism has a square base with an edge 5 cm long and 20 cm high. Calculate it: (a) the area of the base b) the perimeter of the base c) volume d) surface - In UK
In the UK, it was -13°F. And the temperature dropped 5°F. What is the temperature now? - Pool tile area
The swimming pool's interior, with dimensions of 50m, 15m, and 3m, should be lined with tiles. How many square meters of tiles are used for this? - Block cube surface We get a block if we stack two cubes with an edge of 1dm. What is the difference between the surfaces of this block and the cube?
- A man 4
A man has 560 cows. He sells 1/4 of them. How many cows are left? - Number form nearest
We can write the number 1003 in the form 7n + 2. Which can we write the nearest number in this form? - Friends iron average
Five friends compared how much old iron they brought to the collection. It was 55 kg on average, but Ivan got only 43 kg. How many kg on average did they bring without Ivan?
- Children room plan
An architect has two plans for the same apartment at different scales. On the first plan, at a scale of 1:20, the length of the children's room is 20 cm. What is the children's room size on the second plan, on a scale of 1:50? - Evaulate
Evaluate the following expression with natural numbers: 1÷(52×(2×(135−25)−1)) - Ski savings fraction
Adam is saving for new skis. In August, he saved two-sevenths of the total price, in September one-eighth of the total price, and in October two-thirds of the missing amount. Express as a fraction how much he still has left to save from the price of the s - Sphere cut area
We cut a sphere with a diameter of 10 dm into two equal parts. Calculate the area of the cut. - Track suits
There are 100 tracksuits in a box. The sports shop sold 3/10 of the tracksuits on Monday, 1/4 on Tuesday, and they sold 2/5 on Wednesday, and the rest on Thursday. 1. How many tracksuits did the shop sell on Thursday? 2. What fraction of the tracksuits di - Cyclist stage speed
In the first stage, the cyclist covered 70 km at a speed of 22.1 km/h. In the second stage, he covered 40 km (a total of 110 km), and his average speed increased to 22.9 km/h. What an average speed he developed in the second stage! - Aquarium - water
The aquarium is 5 dm long and 4 dm wide and contains 60 liters of water. A) calculate the height of the aquarium if the water reaches 5 cm below the edge B) calculate the total volume of the aquarium - Cuboid - block
The base of the block is a square with an area of 16 cm². The surface of the block is 128 cm². You calculate the volume of the block in cm³. - Quadrangular block The surface of the quadrangular block is 3.4 dm². The edges of the block are 8 cm and 10 cm long. Calculate the volume of the block.
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