Maths practice for 12-year-olds - page 256 of 354
Number of problems found: 7071
- Paper production
About 50% of the pulp is obtained from wood and about 65% from paper. How many tons of paper can we make from 150 tons of wood? - Family equation
father + mom = children How much does the task have to be solved? - Gardens colony
The garden's colony, with dimensions of 180 m and 300 m, is to be completely divided into the same large squares of the highest area. Calculate how many such squares can be obtained and determine the length of the square side. - The buns
Kate, Zofia, and Peter liked the buns. Even today, their grandmother prepares their favorite meal. Katka eats four bunches, Žofia 3, and Petra eats five buns. Their grandmother said, "My inmate, will you know how many buns I have been made today if those - Fence boards
The fence around the garden is made of rhombus-shaped laths with a side 30 cm long and 1.6 m high. How many square meters of boards are needed to make a fence of 300 laths? - Interior designer
To make draperies, an interior designer needs 11 1/4 yards of material for the den and 8 1/2 yards for the living room. If material comes only in 20-yard bolts, how much will be left over after completing both draperies? - Glass balls
Clay balls and several transparent glass balls spilled out of Peter's pouch. Color the balls one by one if you know that 1/6 were red, 3/8 were blue, 7/24 were green, and 1/12 were yellow. How many glasses did he have? - Product calculation the product of the sum and difference of the numbers -2.3 and 4.7
- Apple difference
If Zina gives Darina one apple, then both girls will have the same. How many more apples does Zina have now than Darina? - Rhombus construction
Construct a rhombus ABCD if AB = 5 cm, BD = 6 cm and AC = 3 cm - Sugar 9
150 kg of sugar beet yields 24 kg of sugar. How many tons of sugar beet can be obtained from three tons of sugar? - Equation solving
x / 9-3-2x / 3 = 1-2 / 9-x - Cyclists meeting
Two cyclists drove from two cities 66 km apart. One drove at an average speed of 18km/h, the other at 15 km/h. How many hours will they meet? - Copper density
The copper roller weighs 547.4 g. To determine its volume, use the copper density, which is ρ = 8960 kg/m³. - Passenger trains
Two trains are traveling towards each other on parallel tracks, one at a speed of 34 km/h and the other at a speed of 47 km/h. A passenger sitting on the second train noticed that the first train passed him in 6 seconds. How long is the first train? - Aquarium filling
The aquarium, with a length - of 40 cm, width - of 24 cm, and height of 27 cm, is filled to 2/3. How much water do we need to add to be filled to 8/9? - Square area
Complete the table and then draw each square. Provide exact lengths. Describe any problems you have. Side Length Area Square 1 1 unit² Square 2 2 units² Square 3 4 units² - Big Ben clock
They had three tower clocks in the city. Some went right, others were 10 minutes ahead of the day, and the third was 12 minutes late each day. One day, they struck all the clocks at noon at once. How long will it be like this again? - Simple equation 3
24 = n • 27, solve for n - Shirt
Mrs. Vítková bought each of his three children the same shirt and paid CZK 1,000. The saleswoman returned 568,60 CZK. What was the price of one shirt?
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