Maths practice for 12-year-olds - page 220 of 355

Number of problems found: 7083

Allan
Allan keeps tropical fish. His aquarium is 4 feet long, 1 foot wide, and 2 feet tall. Each fish needs at least 0.5ft³ of water. What is the maximum number of fish he can keep in the aquarium? Please show your solution. Please
Rectangle 45
The perimeter of a rectangle is 60cm if the length of the rectangle is 20cm. a)find the width b)find the area.
The cyclist
The cyclist drove from A to B, 60 km away. The first half drove at 30km/h, and the second at 20km/h. How long did it take for him?
Adding mixed numbers
Add these two mixed numbers: 1 5/6 + 2 2/11=
Tomas Sisters Combined Age
Tomas is 15 years old and has three sisters. Martina is two, Karolina 5, and Zorka 6 years old. How many years will Tomas be as old as all his sisters?
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.
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
Tree planting calculation
The conservation unit planted clearings on 4/7 (this is a fraction) on Saturday; on Sunday, he had 2,100 trees to grow. How many trees have conservationists planted on both days?
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
Square millimeter conversion
1dm square - 7000mm 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.
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?
Far country
In a country far away, the value of 3 pesos is 12 centavos, more than the value of 1 peso. How many centavos is 1 peso worth?
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?
The lowest
The lowest temperature on Thursday was 20°C. The lowest temperature on Saturday was 12°C. What was the difference between the lowest temperatures?
Three-digit number puzzle
Dominika wrote a three-digit number ending with the number 6. When she crossed out the last digit and wrote it at the beginning of the number, she noticed that the new number was as much greater than 600 as the original number was less than 600. What numb
Flooring a room
Find the cost of flooring a room 6.5 m by 5 m with square tiles of sides 25 cm at the rate of rupees 9.40 per tile.
The average
The average of one set of 4 numbers is 35. The average of another set of numbers is 20. The average of the numbers in the two sets is 30. How many numbers are there in the other set?

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