Maths practice for 12-year-olds - page 294 of 362
Number of problems found: 7224
- Height 3344
The bottom is 25m wide and 10m long, and there is 37640 hl of water. What height does the water reach? - Proportion 3343
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? - Adjust 3341
Adjust to basic shape: a) 3kg 40g b) 0.9:1.8 - Price increase
A 20 percent price increase meant a 90-crown raise. How much cost a product after? - Painting 3328
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 Eva collected the whole bucket in an hour. How many minutes would it take to fill a bucket if the two children worked together? - Concrete 3321
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.
- Calculate 3320
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 - Experienced 3318
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? - Imaginary 3313
I think the number. If I add the number 3 to it and divide the sum by the imaginary number, I get the number 2. Which number did I mean? - Calculate 3310
Calculate a number whose 3/4 is two less than 2/5 of its double. - Increased 3309
Find the number whose fifth increased by 8 equals 12. - One-fifth 3308
His father was four years as old as one-fifth of his age now eight years ago. How old is she? - Three-eighths 3307
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?
- Remuneration 3303
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? - Increase 3302
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? - Two-fifths 3301
Calculate a number whose three-quarters is two less than two-fifths its double. - Difference 3300
The difference between five and three times the number, what I think, is three greater than this number. What number do I think? - Positive 3298
Which positive number equals twice its square?
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