The average age of Wojtek, Bartek and Marysia is 15. The average age of Wojtek and Bartek is 13. Wojtek is six years younger than Bartek. How old is everyone?
The size of a fish tank is 3 dm by 0,5 m by 30 cm. A 750 ml jug was used to fill the tank until the water reached four-fifths of the tank's height. How many jugs of water were used?
There were some chestnuts under a chestnut tree. Piotr took 1/9 of them and Staś took 46. Together they had 1/3 of all the chestnuts. How many chestnuts were left under the tree?
The price of a bicycle was reduced by 75zł and then again the new price was reduced by 20%. After both reductions the bike now cots 580zł. Wath was the original proce?
The perimeter of a quadrangle equals 32 cm. After dividing the figure with a diagonal, there are two triangles with 18 cm and 20 cm perimeters. What is the dividing diagonal?
