Maths practice for 12-year-olds - page 102 of 355
Number of problems found: 7081
- Vase water capacity
The cube-shaped vase contains 320 ml of water and reaches a height of 5 CM. How many milliliters of water can we pour into the vase so the water does not run out? - Natural number expression
Find the largest natural number n for which the expression value (37-2n) / 3 equals the natural number. - Cylinder water liters
How many liters will fit in a cylindrical container with a base area of 0.06 m² and a height of 5 cm? - Tank can filling
How many 8-liter cans can we fill from a block tank measuring 1.2 * 1m * 1.6m? - Percentage - prism and cube
Prism with square base a=25cm, height h=45cm. cube: b=15cm a) what percentage of the volume of the prism is the volume of the cube? b) what height should the prism have to have the same volume as the cube? - Magazine subscription savings
One issue of the moderator's magazine costs 1.61 euros. The annual subscription for 12 issues is 18 euros. How much will you save on one issue when subscribing to a magazine? - Chocolate candy ratio
I have a box that contains white, milk, and dark chocolate candies. The ratio of white to milk candies is 3:4. The ratio of white to dark candies is 4:3. The least amount of candies in the box if the conditions of the ratio of candies are met. - Lift box capacity
The lift has a load capacity of 250 kg. How many 15-kilogram boxes can a person weighing 80 kg maximally take? - Box of cereal
Ari and Bill share a 20-ounce box of cereal. By the end of the week, Ari had eaten 3/8 of the box, and Bill had eaten 1/4 of the box of cereal. How many ounces are left in the box? - Random event operations
Consider an experiment with a dice. Let us define the random events A={at most 3}, B={roll more than 1}, C={roll 2, 3, 4}. Determine the random event D that is given by the operations A∪B \ B∪C - Wire length needed
The wire measured 109.3 cm and was 0.327 m shorter than the pupils needed in the class. How long did the pupils need? - Square circle difference
A circle is inscribed in a square with a side of 12 cm so that it touches all its sides. Calculate the difference between the area of the square and the circle. - Cylinder cube water
We placed the largest possible lead cylinder in a 1-liter cube container. How many deciliters of water will now fit in the container? - Quadrilateral prism
Calculate the surface and volume of a quadrilateral prism if given: the area of the base is 40 cm square, the bottom of the base is k = 8 cm, and the height of the prism is 1.3 dm (the bottom is a rectangle) - Hexagonal prism volume
Calculate the volume and surface of a regular hexagonal prism with a height v = 2cm and a base edge a = 8cm. - Sandwiches
In a cafeteria, 1/6 of the students eat salads, and 2/3 eat sandwiches. There are 18 students in the cafeteria. How many students are eating lunches other than salads or sandwiches? - Mathew
Mathew has eight pencils. Three of them do not have erasers on end. What fraction of the pencils do not have erasers on end? - Natural number composition Which natural number contains 12 thousand, 15 hundred, 21 tens, and 11 units?
- Vase height volume
The cylindrical vase has a volume of 1 l. If its base has an area of 0.5 dm2, calculate its height. - For last
Last week, the temperature varied a total of 17 degrees over the day. If the high for the day was 10 degrees, what was the low for the day (write a number sentence and solve it. )
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