Maths practice for 12-year-olds - page 294 of 359
Number of problems found: 7168
- Ratio simplification
Adjust to basic shape: a) 3kg 40g b) 0.9:1.8 - Room painting cost
The painter will paint a room 7 m long, 4.5 m wide, and 3 m high. He charges CZK 27 per 1 m². How much do we pay painters to paint a room? - Collection
John collected half a bucket of raspberries in 45 minutes, and Eve collected the whole bucket in an hour. How many minutes would it take to fill a bucket if the two children worked together? - Water in well
The water in the well is dropped by one ring; the ring has an inner diameter of 110 cm and a height of 80 cm. How much water is left in the well? The chutes are concrete rings forming the walls of the well. - Oats for horses
The farmer has a supply of oats for 5 horses for 12 days. Calculate how many horses would consume the same supply of oats in 1 day. Calculate how many days it would take 6 horses to consume the same oats supply. (The daily ratio for one horse does not cha - Washing elephants
An experienced tamer will wash an elephant in 40 minutes. It takes a temporary worker 2 hours. How long in a minute will a tamer and a temporary worker wash three elephants together? - Number calculation
Calculate a number whose 3/4 is two less than 2/5 of its double. - Number puzzle
Find the number whose fifth increased by 8 equals 12. - Father age
His father was four years as old as one-fifth of his age now eight years ago. How old is she? - Currant planting
There are 600 currant bushes in the orchard. On the first day, they planted two-fifths, and on the second, three-eighths out of the total number of shrubs. How many shrubs do they have to plant? - Rectangle
The length of the rectangle is 12 cm greater than three times its width. What dimensions and area does this rectangle have if its circumference is 104 cm? - Annual reward
The annual remuneration of the two employees was a total of EUR 18,750. The remuneration of one of them in 6 months was the same as the other in a year. How big was the annual reward for each of them? - Cube enlargement
The cube has an edge of 70 dm long. How many times does the volume and surface of the cube increase if we enlarge its edge four times? - Number calculation
Calculate a number whose three-quarters is two less than two-fifths its double. - Number puzzle
The difference between five and three times the number, what I think, is three greater than this number. What number do I think? - Positive number
Which positive number equals twice its square? - Loading car
The car was loaded with 78 boxes weighing 19 kg. If the total weight is the same, how many 25kg boxes can it load? - Average speed
If a train travels at an average speed of 60 km/h, it covers a certain distance in 5 hours and 30 minutes. What average speed would be needed to cover the same distance in 5 hours? - The chef
The chef has to prepare 60 hundred-gram portions of roasted pork. Since 1 kg of raw meat loses 150 grams by baking, how many kilograms of meat does he have to start roasting? - Triangle sides
The perimeter of the isosceles triangle is 32 cm. The base is 2 cm longer than the shoulder. Calculate the sides of the triangle.
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