Maths practice for 12-year-olds - page 167 of 355
Number of problems found: 7085
- Worker earnings calculation
Twelve workers earned 2,000 euros in 10 days. How many workers would 14 workers earn in 8 days? - Train tons
The entire loaded train weighs 760 tons. It has 30 wagons, each carrying 12 tons of grain and empty, weighing 10 tons. What is the weight of the locomotive? - Answers
After the history test, Michaella discovered that the ratio of her correct and incorrect answers is 5:3. How many correct answers did Michaella have in the test if she had six wrong answers? - Pool painting calculation
We will paint the block-shaped pool, with the dimensions of the bottom a = 25 m and b = 15 m and the height c = 3.5 m. If one kg is enough for five square meters of paint, how many kg of paint will we need? - Ice floe
What is the volume of an ice floe weighing 326 kg? The density of ice is only 920 kg/m³. - Independent variable
Separate the variable x1 and move all members of the mathematical notation: (2 x1+x2+x3)=3y+z to the other side. - A cliff
A line from the top of a cliff to the ground passes just over the top of a pole 5 ft high. It meets the ground at a point 8 ft from the base of the pole. The point is 93 ft from the base of the cliff. How high is the cliff? - Tank volume surface
The welded sheet metal tub is shaped a prism with dimensions of 6x2x2 m. How many m³ of water can fit in it, and what is its surface? - Number calculation puzzle
Nine times the number x is seven less than 160. Find the number x you are looking for. - Consecutive number calculation
The sum of two consecutive natural numbers, of which the greater is 4x, equals the number 55. Determine the number x. - The hockey
The hockey player scored six goals from 15 shots. How many % was he successful? - Book reading
Susan thought, "If I read 15 pages a day, I will read the whole book in 8 days. "How many pages would she have to read a day if she wanted to finish the book on the 6th day from the start of reading? And how many pages does the book have? - Typist page calculation
The typist typed 16 pages of text in 2 hours and 8 minutes. How many pages of text will you write at the same speed in 20 minutes? - Everyone drinks the same
Twenty-four bricklayers drink 72 beverage bottles a day at the construction site. How many bottles would 19 bricklayers need? Everyone drinks the same. - Pharaoh
Kleomurapi is a pharaoh. Yesterday, his pyramid builders complained to him that their backs hurt from lifting stones. So the pharaoh had a ramp built that was 6 meters long, 2 meters wide, and 1.5 meters high to make it easier for the builders to reach th - Hangar air volume
How many cubic meters of air is in an empty half-cylinder-shaped aircraft hangar if the hall is 30 m long and 12 m high at the highest point? - Two gears
Two gears with 13 and 7 teeth rotate locked into each other. We want both wheels to be in the starting position again. How many turns does a big wheel have to make? - Car motorcycle meeting
The distance is 77 km. A car at 100 km/h and a motorcycle at 80 km/h will run against him for half an hour. Later. When will they meet? - Circular park
The circular park has an area of 1600 m². Cross the park, right in its center, leads the trail. What is the length of the trail? - Solution Without Equations
The ratio of Eva's and Zdeněk's ages is currently 3:2; in six years this ratio will be 9:7. a) How old are the siblings now? b) By how many years and how many times older is Eva than Zdeněk? c) By how many years and how many times older will Eva be than Z
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