Maths practice for 12-year-olds - page 264 of 359
Number of problems found: 7167
- Flowerbed
The park has a large circular flowerbed with a diameter of 12 m. Jacob ran around it ten times and the shorter Walt seven times. How many meters each went by, and how many meters did Jacob run more than Walt? - Fewer than 500 sheep,
There are fewer than 500 sheep, but if they stand in a double, triple, quadruple, five, and sixth-order, one sheep will remain. But they can stand in the seventh order. How many sheep? - Diameter
What is the inside diameter of the cylinder container if half a liter of water reaches a height of 15 cm? - Paint needed
The janitor is to paint the computer room walls, which are 7 m long, 5 m wide and 3 m high. The classroom has four square windows with a length of 1 m and a door 1 m wide and 2 m high. At least how many kilograms of paint should he buy if 1 kg of paint pa - Father and son
The father is 48 years old, and the son is 23. When will the father be twice as old as the son? - Plan length
The part is 230 meters long. What will its image length be on the plan at a scale of 1:2500? - Children pool
The bottom of the children's pool is a regular hexagon with a = 60 cm side. The distance between opposing sides is 104 cm, and the height of the pool is 45 cm. A) How many liters of water can fit into the pool? B) The pool is made of a double layer of pla - Force meter
We put the statuette on the force meter, which showed a value of 25 N. Then, we placed it on the force meter, completely immersed in the water. The force meter showed a value of 17 N. What is the statuette's volume? - The tank
The tank has 1320 liters of water and is shaped like a prism. Its base is a rectangle with sides a = 0.6 m and b = 1.5 m. How high is the water level in the tank? - Juice box
The juice box has a volume of 200 ml, and its base is an isosceles triangle with sides a = 4,5 cm and a height of 3.4 cm. How tall is the box? - Cremons
The freight wagon is shaped like a cuboid 21m, 3.5m, and 4.2m. How many cube-shaped dorts can be loaded if one is a cube with an edge length of 7 cm? - Stones in aquarium
In an aquarium with a length of 2 m, a width of 1.5 m, and a depth of 2.5 m is a water level up to three-quarters of the depth. Can we place stones with a volume of 2 m³ into the aquarium without water being poured out? - Reading pages
Tomáš and Lukáš read the same book. Tomas read 21 pages a day and read it one day earlier than Luke, who read 18 pages a day. How many pages did the book have? - LCD 2
The least common denominator of 2/5, 1/2, and 3/4 - Highway
Six trucks will be used to build the roadside for 18 days. After three days, the company sent two more trucks to make. How long will it take for the material to move? - Czech crown salary
The employee's monthly salary is CZK 10,800. In the course of the year, the bulk salary increased by CZK 500. Calculate which employer increased month (1 ... 12) if its annual income was 133,600 CZK. - Light area
The lamp illuminates a circle with a diameter of 10 m. What area does the light illuminate? - Lawn irrigation
The water jet for welding the lawn reaches a distance of 1.8 m. How much is the lawn irrigated? - Circle area increase
How does the area of a circle change if we double its radius? How many times does its area increase? - Oil tank and pipes
Two oil pipelines can fill the underground oil tank. The first is filled in 72 hours, and the second in 48 hours. How many hours from when the first pipeline began to fill the oil is necessary to start filling it with the second to fill in 1 and 1/2 days?
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