Maths practice for 12-year-olds - page 238 of 348
Number of problems found: 6954
- Calculate 6207
The cuboid with a base measuring 17 cm and 13 cm has a surface of 1342 cm². Calculate the height of the cuboid and sketch its network. - Konecara 6203
The trip to the top of Konecara and back lasted 5 hours and 17 minutes. We rested at the peaks for 32 minutes. The way back took 51 minutes less than the way there. How long did the trip to the top take? - Dimensions 6201
Mr. John's plot of land has dimensions of 252 dm and 28 m. How far apart must he place the fence posts so they are the same distance on both sides? How many will he need to fence the entire property? - Equation: 6200
Solve the equation: 2y = 4 (0.5 + 3/2) -1 - Water flow 2
How many liters of water will flow in 7 minutes from a cylindrical pipe 1 cm in diameter if the water flows at a speed of 30 km per hour? - Resulting 6194
Three Americans went to the casino. They put 10,000 CZK into the game. The resulting sum on the game report was CZK 160,000 less. They decided to divide the amount owed equally. Do the math and find out how much everyone owes. - Calculate 6193
On a project with a scale of 1:250, the length of the pool is 2.00mm, and the width is 1.00mm. The depth of the pool is 1.5 m. Calculate how many hectoliters of water will fit in the pool. - Three-quarters 6192 The swimming pool in the Veselý yard is square-shaped with dimensions of 2.5m by 3.4m and is 1.7 meters deep. How many liters are in the pool if it is filled to three-quarters of its total volume? Please round the result to tenths.
- Dimensions 6190
The juice box with a volume of 1 l has two dimensions, 6 cm and 165 mm. Calculate the third dimension of the box. - Density 6184
What is the weight of the glass door panel if it is 5 mm thick, 2.1 m high, and 6.5 d wide? The density of glass is 2.5 kg/dm³. - Rectangular prism
What is the volume if I have a rectangular prism with a length of 1,000 cm, a width of 30 cm, and a height of 50 cm? - Mysterious number
The magician thinks of the number: "The mysterious number is first divided by minus five, dividing the result by three, multiplying the number by ten, and dividing the resulting number by minus four. The result is 5. Can you reveal the mysterious number? - Calculate 6178
Calculate the lateral surface area of a pentagonal prism if the total surface area of the prism is 258 cm² and one base of the prism has an area of 64.6 cm². Express the result in cm² as a decimal number. - Contains 6176
Does the yeast cake contain milk, yeast, sugar, and flour in a ratio of 20:4:1:15. How much sugar do we need to make 160 kg of yeast? - Schoolchildren 6175
Of all schoolchildren, one-sixth prefers a pear for a snack, 3/4 of the rest has an apple, and the other five students like an orange for a snack. How many pupils are there? - Consecutive 6174
Find three consecutive integers whose sum is -693. - Headmaster 6171
Jakub walked down the corridor in 24 steps, 45 cm long. How many steps will a janitor cross this corridor if his step is 72cm long? How long is the headmaster if he walks 18 corridors? - Produces 6170
The machine produces 2520 parts in 1 hour. How many will they make in 33 minutes? - The alley
The alley was planted with 490 trees 6 meters away. How many trees would be planted if the distance was 7.5 m? - Thunderstorm
The sound travels 1 km in about 3 seconds. How far is the storm if there is a time interval of 8 seconds between lightning and thunder?
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