Maths practice for 12-year-olds - page 285 of 347
Number of problems found: 6923
- Tree shadow 3
What is the diameter of a tree wrapped in a rope around 3 m 9 dm 7 cm long? How big is its cross-sectional area? - Soap cost
A box with six pieces of soap costs x crowns. How much will five pieces of soap cost? - Distance in time
A speedway racer goes at an average speed of $v kilometres per hour. What distance will he cover in 12 minutes? - Total potatoes
2/5 q of potatoes were sold in the first hour, 5/6 q in the second hour, and 40 kg in the third hour. How many kilograms of potatoes were in total? - Water height
The bottom is 25 m wide and 10 m long, and there is 37640 hl of water. What height does the water reach? - Cheese proportion
Mom makes sheep's cheese and cow cheese spread in a 5:3 ratio for two children. What proportion do they have to mix sheep cheese and cow cheese if they make the same spread in the school cafeteria for 350 children? - 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? - 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? - 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?
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