Math practice for 13 year olds - page 381 of 413
Number of problems found: 8260
- Meat
Half a kilogram of pork and three-quarters of a kilogram of beef cost a total 6.2 Euro. One-quarter of a kilogram of beef and 1 kilogram of pork costs 5.9 Euro. Find the price of 1 kg of each type of meat. - Cylinder - h2
The cylinder volume is 3 liters. The base area is 1.1 dm². Calculate the height of the cylinder. - Children
Less than 20 children played various games in the yard. They can create pairs, trios, and quartets. How many children were in the yard when Annie came to them? - Cathethus and the inscribed circle
A right triangle is given one leg long 14 cm and the radius of the inscribed circle of 5 cm. Calculate the area of this right triangle. - Do you solve this?
Calculate the area S of a rectangle and the lengths of its sides if its perimeter is 472 cm and the sides are in the ratio of 1:3. - Birthdate
Jane brought 30 lollipops and 24 chewing gum for their friends on her birthday. How many friends does she have if everyone receives the same number of lollipops and pieces of chewing gum? How much chewing gum and lollipops have any friends? - Car consumption
The car consumes 7.3 l/100 km. If the diesel price is 1.63 USD/l, how much will it cost to ride 330 km long? - A three-digit numbers
Determine the total number of positive three-digit numbers that contain a digit 7. - Brothers and sisters
Helen has as many brothers as sisters. Her brothers have twice as many sisters as brothers. How many brothers and sisters are in the family? - Tree
How tall is the tree observed at the visual angle 45°? If I stand 3 m from the tree, my eyes are two meters above the ground. - Workers
Workers are digging a jump pit in the schoolyard. The pit is cuboid in shape, with a length of 5 m, a width of 20 dm, and a depth of 36 cm. They excavate 0.4 cubic meters of soil an hour. How much time (hours and minutes) is needed to excavate this pit? - ISO Triangle V2
The perimeter of the isosceles triangle is 474 m, and the base is 48 m longer than the arms. Calculate the area of this triangle. - QuizQ2
The square of the first number equals three-fifths of the second number. Determine both numbers, given that the second number is five times greater than the first, and neither number equals zero. - Product V2
The price of the product was increased by 24%. Price increased by 316. How much money would this product cost if it was, on the contrary, by 14% discounted? - ISO trapezoid v2
The bases of the isosceles trapezoid are measured 20 cm and 4 cm, and their perimeter is 55 cm. What is the area of a trapezoid? - Wheel
The diameter of the motorcycle wheel is 55 cm. How many times rotates the wheel on the road long 3 km? - Sphere - parts
Calculate the area of a spherical cap, which is part of an area with a base radius ρ = 8 cm and a height v = 4.2 cm. - Two workers
The first worker completed the task by himself in 12 hours, and the second in 10 hours. After two hours of joint work left, the first worker went to a doctor, and the second finished the job himself. How many hours did the second worker work himself? - Conference
129 is the total number of employees. 31 employees attended the conference. How much is it in percent? - Paul and Honza
Johnny went to chat on a bike without a break 4.0 hours. Paul went the same way without breaks 40 minutes longer. The difference between the speeds of the two boys was one kilometer per hour. How fast was Paul if you know that the boys' speed did not chan
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