Maths practice for 12-year-olds - page 222 of 351
Number of problems found: 7018
- Game 27
Susan wanted to play the game. In the beginning, the first says a number from 1 to 8. Then the second player adds a number from 1 to 5 and tells the sum. Again, Susan adds a number from 1-5 and says sum, etc. The winner must say the number 27. What first - Point construction
Given an isosceles right triangle ABS with base AB. On a circle centered at point S and passing through points A and B, point C lies such that triangle ABC is isosceles. Determine how many points C satisfy the given conditions and construct all such point - Pump Fill Tank Time
The pump delivers 0.75 hl of water per minute. How long does it take to fill the tank with a volume of 10m³? Write the result in hours and minutes. - Adult
An adult person should drink on average 2.5 litres of liquids per day and sleep 7 hours. He works 8 hours daily. The diet should consist of three nutrients: proteins, carbohydrates, and fats. Per 1 kg of body weight of an adult, these are 2 g of proteins, - On the bed
We want to plant several rows of cauliflower seedlings and several rows of lettuce seedlings alternately on the bed. The cauliflower seedlings are planted 45 cm apart, the lettuce seedlings 25 cm apart. Planting seedlings of both types of plants starts fr - Paper box
Calculate whether 11 dm² of paper is sufficient for gluing a box without a lid with bottom dimensions of 2 dm 15 cm and 12 cm high. Write result as: 0 = No, 1 = Yes - Cube surface and volume
Find the surface of the cube with a volume of 27 dm³. - Pound2kilos
How many pounds equal 1 kilogram? - Soup from canteen
For how many people is 90 liters of soup enough if we assume 3/8 liters of soup per person in the canteen? - Inlet and outlet
The pool has a capacity of 50 hl. The inlet pipe flows in 1 minute 1.25 hl, and the waste pipe outlet drains the full pool in 50 minutes. How long will it take to empty the entire pool when both the inlet and outlet are opened simultaneously? - Trams Cycle Meeting Time
Three trams left the tram depot at once. The first has a 20-minute cycle, the second a 40-minute cycle, and the third a 65-minute cycle. After how many minutes will the same trams meet if they run continuously (drivers take turns)? - Cris had
Cris had 15000. He spent 1/3 of his money on a table and the remaining on five similar chairs that cost the same. How much did one chair cost? - Temperature measurement calculation
In the evening, Zuzana measured the air temperature at -2.4 °C. In the morning, she measured the temperature three times higher. What temperature did Zuzana measure in the morning? - Soldier
An experienced soldier digs a good trench in 30 hours. Two soldiers dug the same trench every 40 hours. How many hours will the ditch dig all three together? - Paper Cut Largest Square
The paper has dimensions of 220 mm and 308 mm. We need to cut it into as large a square as possible. What will be the side of this square? - Exercisers
How many exercisers are in the gym (minimum number) if there is one left after ordering into three, four, and five steps? - Reservoir 3
How many cubic feet of water is stored in the reservoir that has a length of 200 feet, a width of 100 feet, an overflow depth of 32 feet, and a current water level of 24 feet? - Bread baking expression
In the bakery, they baked five loaves of wheat bread and one less loaf of rye bread. a) depending on the quantities p, z, express how many loaves of rye bread they baked. b) depending on the quantities p and z, express how many loaves of wheat they baked - Electricity blackout
On Tuesday at 6 o'clock, the electricity supply was interrupted at 156 h. On which day (1 = Monday, ... 7 = Sunday) and at what time was the electricity supply resumed? - Clock arc length
Calculate the length of the arc, which will describe the endpoint of a longer hand 10 cm long wall clock after 20 minutes.
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