Maths practice for 12-year-olds - page 225 of 352
Number of problems found: 7022
- Continuously 7164
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 7146
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? - Dimensions 7131
The paper has dimensions of 220mm and 308mm. 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? - Quantities 7120
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? - Calculate 7111
Calculate the length of the arc, which will describe the endpoint of a longer hand 10 cm long wall clock after 20 minutes. - Dort
The cube-shaped cube box has dimensions of 30 cm × 30 cm × 12 cm. How many CZK (Czech crowns) would it cost to be the biggest cake that would fit into the box when a 10 cm³ cake costs CZK 0.5? The cake has the same shape as the box. - The perimeter 2
The perimeter of the quadrilateral a = 1m b = 14/5m c = 2 3/10m d = 1 4/5m? - Calculate 7102
The combine harvester 51.52 t of wheat from 18.4 ha. a) calculate the yield per hectare. b) What field area would the farmer have to harvest 350 tonnes at the same yield? - Corresponding 7100
A honeycomb is made up of cells that resemble a regular hexagonal prism, with a base edge length of 3 mm and a corresponding height of 2.6 mm. The height of the prism is 12 mm. a) How many liters of honey are there in the whole comb if the comb consists o - Playstation
Anton wants to cover the cover for the game on the Playstation with the original paper. The cover is shaped like a block measuring 13 cm × 17 cm × 15 cm. Anton bought 0.35 m² of silver paper. Will the paper be enough to cover the cover? (1 = Yes, 0 = No) - Aquarium 7098
The zoo has an aquarium with a length of 2.5 m, a width of 1.5 m, and a depth of 2 m. The water reaches 3/4 of the height of the aquarium. Can we put a 2 m³ stone in the aquarium without the water spilling out of the aquarium? (1=Yes, 0=No) - Clubhouse
There were only chairs and tables in the clubhouse. Each chair had four legs, and the table was triple. Scouts came to the clubhouse. Everyone sat on their chair, two chairs were left unoccupied, and the number of legs in the room was 101. How many chairs - Watching TV
One evening, 2/3 of the students watched TV. Of those students, 3/8 watched a reality show. Of the students who watched the show, 1/4 recorded it. What fraction of the students watched and recorded reality TV? - Grandfather's 7087
What height in meters is my grandfather's pool if it can hold 7350 liters of water, and the lower dimensions of the pool are 2.1 and 2.5 meters? - Six-sevenths 7086
The tank is 3.3 m cube-shaped. If it is filled to six-sevenths of its volume, how many liters of water are in it?
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