Maths practice for 12-year-olds - page 336 of 359
Number of problems found: 7168
- Circles
The area of a circle inscribed in a square is 7. What is the area of a circle circumscribed around a square? - Freight train
The train carries 525 tons of limestone in 29 wagons. Wagons are 15 tonne and 20 tons. How many are 15 ton, and how many are 20 ton wagons? - Football season
Throughout the football season gave, Adam 23 goals more than Brano and 16 goals less than Charles. Eddie gave the six goals more Dustin. Charles gave five more than Eddie. Brano and Eddie gave together 17 goals. How many goals did you give each boy, and h - Chicken and rabbits (classic)
Grandmother bred chickens and rabbits. It found that the yard has 25 heads and 70 legs. How many chickens and rabbits breed in the yard? - 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. - Ratio of perimeters
Rectangle ABCD has dimensions 11 cm and 7 cm, and KLMN rectangle has dimensions 10 cm and 10 cm. Calculate the ratio of the perimeter ABCD and perimeter KLMN. - Cylinder - h2
The cylinder volume is 3 liters. The base area is 1.1 dm². Calculate the height of the cylinder. - The carpet
How many meters of carpet 90 cm wide need to cover the floor room, which has a rectangular shape with lengths of 4.8 m and 2.4 m, if the number of pieces on the carpet is needed to be lowest? - 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? - 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? - Time
16.7 days ..... how many hours is it? - Cottages
The summer camp has 41 cottages. Each has rooms for three and four. How many of the 140 campers live on three? - 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? - 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? - Wheel
The diameter of the motorcycle wheel is 55 cm. How many times rotates the wheel on the road long 3 km? - 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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