Maths practice for 12-year-olds - page 29 of 167
Number of problems found: 3326
- Money Sharing Equal Amount
Sylva and Šárka have 20 CZK together. If Sylva gives Šárka 6 CZK, they will have the same. Sylva has how many more CZK? - Five Odd Numbers Sum
The sum of five consecutive odd numbers is 35. What are these numbers? - Mixing Celsius and Fahrenheit
Add up three temperatures: 5°F +6°F +0°C - Inlet minus outlet
Water flows into the tank through two pipes and out of the third pipe spontaneously. Pipe A would fill the tank in 3 hours, pipe B would fill in 4 hours, and pipe C would flow out in 12 hours. If all three pipes open simultaneously, how long will the tank - Company layoff proportion
The company RAK employs two groups of workers: workers and administration. There are three times more workers than the administration. Half of the administration and a third of the workers will be laid off. What proportion of the company's employees will - Cube root
For 13, Sam wrote 2891 instead of the correct cube number. By how much was he wrong? - Velocipedes
In the 19th century, bicycles had no chain drive, and the wheel axis connected the pedals directly. This wheel diameter gradually increased until the so-called high bikes (velocipedes) had a front-wheel diameter of up to 1.5 meters, while the rear wheel w - Pool capacity
The pool is 30 m long, 12 m wide, and 2 m deep. Can it contain 7,000 hl of water? If so, what is the level? If not, how much extra water is there? - Tony works
Tony works as a welder for a construction company. His hourly wage is $15.51, and he works 40 hours per week. Tony gets paid vacation each year. The construction company is doing well and has plenty of work for the next year. Tony can expect to work the e - Expression value puzzle
Number 1 is the value of the expression: a 5-3 b. 22 - 32 c. (2 - 3)² d. 2 - 32 e. 32 - 22 - Opposite sum difference
The opposite sum of numbers 12 + 13 adds the opposite number of their difference. Which of the following is correct? - The thermometer At 8:00 in the morning, the thermometer showed an outside temperature of 16.7 degrees. It rose by 2.6 degrees in two hours. What temperature did we have at 10:00?
- Cube cutting calculation How many can small cubes with a 1cm long edge cut from a cube with a 3cm long edge?
- Aquarium
Find how many dm² of glass we need to make a block-shaped aquarium (the top is not covered) if the dimensions are to be a width of 50 cm, length of 120 cm, and height of 8.5 dm. - Bus lines
At 5.00 in the morning, four buses left the terminal at the same time. The first bus has an interval of 15 minutes, the second 20 minutes, the third 25 minutes, and the fourth 45 minutes. How many minutes will all four buses leave the terminal at the same - Wood dividing
Which equation calculates the number of 1/3-foot pieces that we can cut from a piece of wood that is 7 feet long? - Pencil cut
Veronica cut a 10cm pencil. Each turn, the pencil was reduced by 0.2mm. She turned the pencil 100 times. How many centimeters has a pencil now? - Poplar
How tall is a poplar by the river if we know that 1/5 of its total height is a trunk, 1/10th of the height is the root, and 35m from the trunk to the top of the poplar? - National park
In the national park, the ratio of the wooded area to grassland is 4:1. The total area is 385 km². What area is wooded? - Orange juice
They have three types of juice in the buffet in the morning. /6 pcs orange, 4 pcs apple, 2 pcs currant/ In three hours, half of the currant juice and half of the apple juice were sold. No one had ordered orange juice by then. What part of the total supply
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