Math practice for 13 year olds - page 253 of 413
Number of problems found: 8260
- Sheep Hens Legs Count
The same number of hens as sheep ran around the yard. They had a total of 168 feet. How many were sheep, and how many hens were there? - Car Speed and Distance
The car will cover a certain distance in 3 hours and 20 minutes. If he increases his speed by 10 km/h, he will cover this distance in 2.5 hours. Calculate this distance. - A tile
A tile setter is covering a 5 ft by 5 ft square shower wall. Each tile covers 4 5/8 in by 4 5/8 in a square. How many rows of tile are needed to reach 5 ft? How many tiles are needed to cover 5 ft by 5 ft square - Three machines
The power of the three machines is 2:3:5. Two most powerful machines produce 400 parts per hour. How many components make all three machines in 3 hours? - Grade pupil distribution
There are a total of 58 pupils in the sixth and seventh grades and a total of 57 pupils in the sixth and eighth grades. There are a total of 59 pupils in the seventh and eighth grades. How many pupils are there in each class? How many students are there i - Cube
The sum of all cube edges is 30 cm. Find the surface area of the cube. - Helmet
Nowadays, better results can be obtained in cycling due to the rider's physical preparation and updated technologies. One of the essential parts of the rider's equipment is their helmet. While most bikers wear a helmet mainly to protect themselves, racers - Television quality probability
In the department store, they have 100 televisions, of which 85 are of first quality, and 15 are of second quality. The first ten buyers received a premium TV. What is the probability that the eleventh is sold a second-rate TV? - Dual increases
The two numbers are in the ratio of 5:6. If the first one decreases by ten, and the second one increases by ten, then these two numbers are in the ratio of 4:7. What are the numbers? - Chocolate Boxes Weight
They delivered 75 kg of chocolates to 214 candy boxes at the Orion plant. Some weighed 500 g, others 250 g. How many boxers were there? - Profit from Diluting Juice
In the restaurant, they sell 0.2 l of juice for CZK 14. The waiter cheats the guests by diluting the juice with water at a ratio of 4:1. Water costs CZK 6 for 1 liter. How much extra did the waiter charge when he sold 10 liters of this mixture? - Rectangle JANO
The rectangle has side lengths | JA | = 16 cm and | AN | = 12 cm. Point S is the center of the JO side, and point T is the center of the JA side. Calculate the perimeter of the pentagon in cm. - Chocolate
I have a box of chocolate - white, milk, and dark. The ratio of white to milk with dark is 3:4. The ratio of white and milk to dark is 17:4. Calculate the ratio between white, milk, and dark chocolate. - Ages 2
A man's age is four times his son's age. After five years, he will be just twice his son's age. Find their ages. - Isosceles trapezoid
A father decided to replace the tabletop, which is shaped like an isosceles trapezoid, with parallel sides of 120 cm and 60 cm, and a shoulder that is 50 centimeters long. How much does it pay for a new plate and a square meter worth 17 euros? - Area of a circle
The circumference of the circle is 150.72 centimeters. Calculate the area of the circle. - Two Digit Numbers Digits
How many two-digit numbers can be written using the number 0,2,6? We can also repeat the digits in the number. - Unknown Number Increase Percent
If you increase the unknown number by 14 percent, you get the number 136.8. Find an unknown number. - Hectoliters
How deep is the pool if there are 2025 hectoliters of water, the bottom dimensions are a = 15 meters b = 7.5 meters, and the water level is up to 9/10 (nine-tenths) of the height? - Three pumps
We are filling the pool. The pool would fill the first pump in 12 hours and the second in 15 hours. If all three pumps ran simultaneously, they would fill the pool for 4 hours. How long would the pool fill only with the third pump?
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