Maths practice for 14 year olds - page 146 of 362
Number of problems found: 7228
- Base percentage
40% of the base is 1200. Determine what the base is. - Number by percentages
Increase the number 250 by 11%. - Bank account CZ
We will deposit CZK 6,600 into the bank for one year with an interest rate of 2.5%. The interest tax is 15%. How many crowns will we receive after one year? - Percentage comparison
What is more, 14% of 27 or 15% of 28? - Cardboard - boxes
The closed cardboard box has the shape of a block measuring 25 cm, 1.2 dm, and 0.5 m. How much cardboard is needed to make 20 such boxes? You need to add 5% to bends. - Squares above sides
In a right triangle, the areas of the squares above its sides are 169, 25, and 144. The length of its longer leg is: - Metal sheet
Calculate how much sheet metal is needed to make a closed block-shaped container with dimensions of 2 m, 7 m, and 9 m if we must add 12% to the welds. - True and false
A circle k(S; 8 cm) is given. Furthermore, points K, L are given such that the following holds: the length of SL is 6 cm, the length of SM is greater than 8 cm. Which of the following statements is not true a. The circle m(M; |ML|) has exactly two common - Stationery sales average Monday. 668 euros Tuesday. 624 euros Wednesday. 816 euros Thursday. 584 euros Friday. 826 euros The table records sales in the stationery store during the working days of one week per month. If the average daily sales during the weekend were 860 euros, by
- The mountain hut
A mountain hut has a food supply for 8 tourists lasting 15 days. Half as many more tourists arrive unexpectedly. How long will the food supply last, assuming the daily ration per person remains the same? - The diagonals
The diagonals of the KOSA diamond are 20 cm and 48 cm long. Calculate the circumference of the diamond in centimeters rounded to one unit. - The storm
After the storm, the top of the 5 m high mast deviated by 1 m from the original vertical axis. What is the peak now? Round to 2 decimal places. - Cuboid - ratio
Find the volume of a block whose dimensions are in the ratio 2:3:4 and the surface is 117 dm². - Squirrels
The squirrels discovered a bush with hazelnuts. The first squirrel plucked one nut, the second squirrel two nuts, and the third squirrel three nuts. Each new squirrel always tore one nut more than the previous squirrel. When they plucked all the nuts from - The base 2
The base diameter of a right cone is 16 cm, and its slant height is 12 cm. A. ) Find the perpendicular height of the cone to 1 decimal place. B. ) Find the volume of the cone, and convert it to 3 significant figures. Take pi =3.14 - Spherical section cut
Find the volume of a spherical section if the radius of its base is 10 cm and the magnitude of the central angle ω = 120 degrees. - Trapezoid height angle
In the isosceles trapezoid ABCD, its bases AB = 20 cm, CD = 12 cm and arms AD = BC = 8 cm are given. Specify its height and alpha angle at vertex A - Population growth percentage
The population increased from 29,000 to 31,500 in 5 years. Calculate the average annual population growth in percents. - Apprentice
A master craftsman helped an apprentice complete part of a task, and the apprentice completed the rest himself. It turned out that the time needed to complete the task was three times shorter than if the apprentice had completed the entire task himself. H - Team order possibilities
There are five good teams in the qualifying group for the World Cup. How many different orders can occur?
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