Maths practice for 12-year-olds - page 143 of 355
Number of problems found: 7085
- Glazing workshop
Roof arches have the shape of an equilateral triangle. The length of the side of the arch was 0.6 m and the height 0.52 m. How many m² of glass are needed for glazing 48? - Prism height
The volume of the triangular prism is 200 dm3, and the base is a triangle with a side of 10 dm and a corresponding height of 5 dm. Calculate the height of the prism. - Roxville
The temperature in Rockville decreased by 15 degrees in five hours. What was the average decrease in temperature per hour? Write your answer as an integer. - Board weight
Calculate the weight of a wooden board 18 dm long, two dm wide, and 0.3 dm thick if you know that 1 m³ of wood weighs 660 kg. - Milk cream
They used a quarter of the imported milk to make butter, half to make a cream, and 100 liters to make cottage cheese at the dairy. How many liters of milk was used to make the cream? - Passenger boat distribution
During the rescue of the sinking ship, the passengers were divided into three boats in a ratio of 3:4:5. There were 15 passengers in the first boat. How many passengers were rescued together? - Natural number creation
How many natural numbers can you make from the digits contained in the number 4002? No digit may be repeated in the number entry. However, not all digits must be used. Sort the numbers in ascending order of size. - Mushrooms
Mr. Mushar collected mushrooms. One-fifth he gave to neighbors, one-third to dry, and divided the remaining mushrooms into three equal parts: himself, son, and daughter. Daughter Dominika got 42. How many mushrooms did he collect in total, and how many mu - Snow wall
The boys want to build a defensive wall out of the snow for the ballpark. They want it to be 5 meters long and 1.5 meters high. They can make and transfer 50 cm cubes from snow. How many such cubes must he make to build his wall? - Square root
Calculate the product of the sum and difference of the numbers of the square root of 5 and the square root of 3 (in this order). - Flower box
A wooden flower box in the shape of a cuboid has the following external dimensions: length 120 cm, width 15 cm, and height 20 cm. It is made of wooden slats 1.5 cm thick. a) At least how many m² of slats were needed to make it? Calculate according to the - Evan
Evan, Samuel, and Alex are doing a biking relay on the Key Biscayne Bridge. Altogether, they bike a total of 7 miles. If Evan bikes 2 1/3 of a mile and Samuel bikes 2 1/4 of a mile, what distance does Alex bike? - A wheat
A wheat factory packages wheat in sacks of three different colors. The following table shows the amount of wheat (in kg) packed in each type of sack. White sack 2 kg Brown sack 3 kg Black sack 4 kg What is the total amount of wheat (in kg) which can be pa - The heights
The heights of some dogs are shown in the table. (1 cm = 10 mm) Dog; Height Sam ; 280 mm Charlie; 56 cm Gus; 81,3 cm Buster; 635 mm Max; 38 cm Duke; 61 cm Which list shows the heights of the dogs from tallest to shortest? A. Max, Charlie, Duke, Gus, Sam, - Diamond height perimeter
The diamond has an area of 36.9 cm² and a side length of 9 cm. a) How many cm does the height of the diamond measure? b) Calculate the perimeter of the diamond. - Walk for exercise
Anya, Jose, Cali, and Stephan walk for exercise. Anya's route is 2 1/4 kilometers long. Jose's route is 1 1/2 fewer km. Cali's route is 1 1/2 times as long as Jose's route and two fewer km than Stephan's route. What distance (S) is Stephan's route? - Quadrilateral sides
What is the perimeter of a quadrilateral whose first side is 3 cm longer than the second side, the third side is 5 cm shorter than the fourth side, and the second side is 2 cm shorter than the fourth side? - Glasses of juice
Jake's mom filled a 2-liter container with juice. Then Jake poured two glasses of juice. Each glass had precisely 400 milliliters of juice. How many liters of juice remain in the container? - Statues
Diana is painting statues. She has 7/8 of a liter of paint remaining. Each statue requires 1/20 of a liter of paint. How many statues can she paint? - The golf
The golf ball with a diameter of 43 mm is packed in a cube-shaped box. What percentage of the box volume is made up of a ball?
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