Maths practice for 12-year-olds - page 185 of 347
Number of problems found: 6923
- Pool filling calculation
The 300 liters per minute water starts to flow into the empty pool. We will fill the pool in 5 hours. How long would it take to fill a pool with a more powerful 750 L pump per minute? - Earnings hour division
Two workers worked on a joint task: One worked 36 hours and the other 40 hours. Earnings of 11400 are divided by the ratio of hours worked. How much did everyone get? - Diamond circumference change
How do I change the length of a diamond's side if I want its circumference to double? - Salary reduction calculation
The employer reduced Mr. Mak's salary by 4:5. If he received € 720 in his account, how much did he initially earn? - Risotto ingredient calculation
To prepare poultry risotto for 4 diners, we need 200 g of rice, 150 g of mushrooms, 150 g of peas, 300 g of chicken, 600 ml of stock, and 5 g of salt. What amount of ingredients do we need for 10 diners? - Linear function
Write the following problems using x as the unknown variable, using one of the following forms: x+p=q or px=q. Larry ran seven more miles than Barry in a month; if Larry ran 20 miles, how many did Barry run? - Please help its due tomorrow
Using one of the following forms, x + p = q or px = q, write a formula that represents these problems, using x as the unknown variable. Emily can jump twice as far as Evan on the broad standing board if Emily can jump 6.5 feet. How many feet can Evan jump - Excavation car transport
How many cars will the dirt be transported in an excavation 10 m long, 11 m deep, and 70 cm wide if the load capacity of each used car is 2 tons? The clay density is 1,800 kg/m². - Class student calculation
About an eighth of the 9th-grade students are interested in studying at the academy, about a sixth at the gymnasium, one quarter at the SOU, one-third at the vocational school, and 3 students at art schools. How many pupils are there in the class? - Rectangle area change
The sides of the rectangle are 6.6 cm and 4.2 cm. We change its dimensions in a ratio of 5:2. How many times does the rectangle's area change compared to the original rectangle? - Car meeting calculation
When and where will the two cars that drove at the same time from cities A and B 90 km apart if the car from city A travels at a speed of 75 km/h and the car from city B at a speed of 60 km/h meet? - Line proportion calculation
On line AB, 15 cm long, point C lies 4 cm from point A. In what proportion does this point divide the line AB? - Pitcher volume comparison
One pitcher is filled to 22/25 of its volume. The other pitcher is filled to 1/9 of its volume. Which pitcher is filled more? - Bucket volume increase
We threw a prism with the base of a right triangle with squares 15 × 10 cm and a prism height of 1.5 dm into a 10 l bucket. How much has the volume in the bucket increased? - Line part comparison
The line AB, whose length is 24 cm, is divided in a ratio of 5:3. How much longer is its larger part? - Line length change
The given line is MN with a length of 11 cm. Change its length in the ratio: a) k = 2:1 b) k = 1:2 c) k = 17:11 d) k = 22:33 - Line division calculation The KL line is 12 cm long. Point X divides the line in a ratio of 1:5. What is the length of line XL if point X is closer to point K?
- Square - increase sides
If we increase the length of one pair of opposite sides of the square by 2 cm and the length of the other two sides by 1 cm, we will create a rectangle, the perimeter of which will be 10% larger than the perimeter of the original square. What is the side - Block volume area
A cuboid has a rectangular base 2.6 m long and 2.2 m wide. The height of the cuboid is 1/8 of the base's perimeter. Calculate the volume and surface area of the cuboid. - Lake path calculation
Lake Trasimeno is approximately in the shape of a circle, its area is about 28 square kilometers, and Mr. Hector's walking speed is approximately 4 km/h. Calculate the length of the path around the lake and how many hours Mr. Hector would have to walk to
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