Math practice for 13 year olds - page 393 of 426
Number of problems found: 8513
- Parallelogram ABCD
The area of parallelogram ABCD is 906 cm². Points M and N are the midpoints of the sides AB and BC. What is the area of a quadrilateral MBND? - Bonbons 2
Kilo sweets will cost 260 CZK. The first type has a price per 320 kg, and the second type is 240 CZK per kg. How many kilos of both kinds of sweets need to prepare a 81 kg mixture? - 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 - Cuboid
Cuboid ABCDEFGH with 10 cm height has a base edge length 6 cm and 8 cm. Determine the angle between the body diagonal and the base plane (round to degrees). - 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. - 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? - 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.
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