Math practice for 13 year olds - page 252 of 413
Number of problems found: 8260
- The volume 2
The volume of a cube is 27 cubic meters. Find the height of the cube. - On a farm
A farm has 900 rabbits, 700 sheep, 300 cattle, and 500 pigs. What percentage of the total number of animals are rabbits? - Two friends
Peter can do all his work himself in 6 hours, while Martin can do the same work himself in 8 hours. Peter worked first and was then replaced by Martin, so the whole work was done in 6.5 hours. Calculate how long Peter worked before being replaced by Marti - Dental check class
Class 7B is having a preventive dental check-up. Two dental caries were found in a quarter of the pupils and one caries in an eighth. Half of the class had all their teeth healthy. How many pupils go to class 7B if three pupils are absent on the day of th - Sugar production
From 1 ton of beet, 150 kg of sugar is produced. 450 kg of lime is consumed to clean 1 ton of sugar. Calculate how many kgs of lime are consumed when processing 1 ton of sugar beet. - Book 10
Monika wants to start reading a book. She calculated that if she reads exactly 14 pages every day, it will take her one page longer to read the book than if she reads exactly 16 pages every day. Calculate how many pages the book has. Determine how many da - Test Score Unanswered Questions
The test has 50 questions. Four points are counted for each correct answer, 3 points are deducted for an incorrect answer, and 2 points are deducted for an unanswered question. Peter scored 108 points on the test but answered only 6 questions. How many qu - Area to volume
If the surface area of a cube is 486, find its volume. - Cube Surface Ratio Edges The lengths of the edges of the two cubes are in the ratio 2:3. Determine how many times the surface of the larger cube is larger than the surface of the smaller cube.
- Test Points Correct Incorrect Tomáš was given the task of solving 10 problems. He received 3 points for each correctly solved, and 4 points were deducted for each incorrectly solved. He scored a total of 9 points. How many tasks did he solve correctly, and how many incorrectly or not
- Simple Interest Calculation
Calculate the interest and rum (APR, annual interest rate) is 2.5% and the principal 50,000. - Square millimeter conversion
1 dm square - 7000 mm square - Marriage sttus
In our city, 3/5 of the women are married to 2/3 of the men. Find what part of the population is free. - Number machine modifications
The Numerometer has invented as the number machine that changes numbers until it makes them single-digit numbers. He still makes the change according to the same rule. For example: from the number 87312, after six modifications, he gradually made the numb - Mice of Each Color
The hat has 14 grays, eight white, and six mice. What is the smallest number of mice we have to pull out of our hats to ensure we have at least one mouse of each color? - Number reduction puzzle
Determine which number reduced by its three-sevenths is 120. - Grandmother Granddaughter Age Puzzle
Grandma is five times as old as her granddaughter today. 2 years ago, the grandmother was six years less than six times her granddaughter's age. How old is Grandma today? - Father Son Age Equation The father is eight years older than three times the son's age. In 20 years, the father will be twice as old as his son. How many years is a father, and how many are a son?
- Acid Solution Percentage
The barrel contains 199 liters of 38% acid solution. What percentage of acid is created when we take 61 liters and replace it with the same amount of water? - The florist
The florist had 200 roses in the morning. During the day, more than half sold it. The remaining roses will be tied to the bouquet. One always remains if a bouquet of 3, 4, 5, or 6 roses is bound. How many roses from the morning shipment were sold?
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