Math practice for 13 year olds - page 381 of 413
Number of problems found: 8253
- 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 - Wheel
What is the wheel diameter if the 0.57 km track turns 106 times? - Sports games
Pupils of the same school participated in district sports games. When dividing the teams into teams, it was found that in the case of the creative teams with four pupils, one pupil was remaining, five-member teams had two pupils, and six-member teams had - Chalet
The children were on a school trip to the mountain. One-third of the journey went by train and continued by bus. When you get off the bus, they remain a third of the distance they traveled by bus. What part of the journey do children go by bus (write as a - Climb in percentage
The height difference between points A and B is 475 m. Calculate the percentage of route climbing if the horizontal distance between places A and B is 7.4 km. - The body
The body on the figure consists of cubes with an edge length of 7 cm. What surface has this body? - Three dice
When you throw three dice was, the sum total of the dice 10. The yellow dice fell one eye more than on the red, and brown fell three eyes less than red. How many eyes fell on every dice? - Enterprise and wages
The enterprise operates a total 115 workers, and their average salary is M dollars. If the company has hired an additional 15 employee whose average wage would be the S dollars, it will reduce the overall average salary by 2.6%. Calculate the value of the
Do you have unsolved math question and you need help? Ask a question, and we will try to solve it. We solve math question.
