Maths practice for 12-year-olds - page 263 of 359
Number of problems found: 7167
- Tailor
From the rest of the cloth, the tailor could cut off either 3 m in men's suits without a vest or 3.6 m with the vest. What shortest possible length could the rest of the cloth have? How many suits a) without a vest b) With a vest, could you make the tailo - Roses 2
Aunt Rose went to the flower shop to buy three rose bouquets. The flower shop had white, yellow, and red roses. How many different flowers bouquets can a flower make for Aunt Rose create? Write all the bouquet options. - Guess a fraction
Tom was asked to guess a fraction. The sum of 1/2 of the numerator and 1/3 of its denominator is 30. If Tom subtracts 36 from its denominator, the fraction becomes 1/3. What is the fraction that Tom was asked to guess? (Leave your answer in the simplest f - Dividing money
I have CZK 6,155, and I need to divide it as a percentage into two outstanding amounts: CZK 12,000 and CZK 35,000. How much money will I send to each of them? Thank you for your answer. - Pills
If it takes 20 minutes to run a batch of 100 pills, how many minutes would it take to run a batch of 50 pills? - Triangular prism
Calculate the volume and surface of the triangular prism ABCDEF with the base of an isosceles triangle. Base's height is 16 cm, leg 10 cm, base height vc = 6 cm. The prism height is 9 cm. - Embankment volume
A path will lead to an embankment across the floodplain. The embankment will be 2 km long and have the shape of an isosceles trapezoid in cross-section with base lengths of 12 m and 8 m and a height of 2 m. Calculate the volume of material needed to build - Gasoline tank
How many liters of gasoline are in the tank in the shape of a quadrilateral prism with the base of a diamond with a side of 25 cm and a height of 15 cm? The gasoline reaches 4/5 of the tank height, and the tank height is 50 cm. - Cakes 4
Mother wants to bake three cakes. For the preparation of the first cake she needs 40 minutes and its baking in the oven lasts 25 minutes. The second cake she prepares in 20 minutes and it bakes for 35 minutes. The third cake she prepares in 50 minutes and - Display case
Place a glass shelf at the height of 1 m from the bottom of the display case in the cabinet. How long platter will we place at this height? The display case is a rectangular triangle with 2 m and 2.5 m legs. - Thales
Thales stands 1 m from the edge of the hole. The eyes are 150 cm above the ground and look into the hole with a diameter of 120 cm, as shown. Calculate the depth of the hole. - Boys at camp
At the camp, half of the boys went on a trip one day, a third went swimming, and 17 boys had various services. How many boys were there in total at the camp? How many boys were on the trip, and how many were swimming? - Black passengers
Five inspectors will catch an average of 70 black passengers in 6 days. How many black passengers are caught by nine inspectors in 10 days? - Crown coins
Jane saves two-crown and five-crown coins. She has 32 coins in the cashier. How many two crowns and how many five crowns would she have if she saved 145 crowns? - Triangle construction
Try to construct the MNP triangle. p = 6 cm, n = 5 cm, Vp = 4 cm Answer the measured side length m - Apartment sizes
The house has apartments of three sizes. One-sixth are four-room, and one-third are two-room. There are 160 three-room apartments. How many two-room apartments are there? - Rhombus EFGH
Construct the rhombus EFGH where e = 6.7 cm, height to side h: vh = 5 cm - Train distance
Two trains traveling in opposite directions meet at 8:00. How many km apart are they at 8:20 when one goes at 75 km/h and the other at 120 km/h? - Kilometers in the city
If the distance between two cities is 15 kilometers, and the scale of the map is 1:300000, what is the distance on the map? - Menu choices
The dining room offers three types of soups and four types of main courses. How many ways can we choose soup and the main course?
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