Maths practice for 14 year olds - page 252 of 382
Number of problems found: 7625
- Square measurements
Find the area and perimeter of a square whose diagonal is 10 cm. - Equilateral triangle
Calculate the area of an equilateral triangle with a perimeter of 72 cm. - The diamond
The diamond has 35 cm-wide sides, and the diagonals are in a ratio of 1:2. Calculate the diagonal lengths. - A candle
A candle shop sells scented candles for $16 each and unscented candles for $10 each. Today, the shop sells 28 candles and makes $400. a. Write a system of linear equations that represents the situation. b. Solve the system to answer the questions: How man - Shoes Children Men Women
The store received a total of 666 pairs of children's, men's and women's shoes. Men were 2.5 times less than children, while children were 1.4 times more than women. Express in whole numbers the ratio of the number of pairs of children's, men's, and women - Prism + rhomboid
The prism-shaped vessel with a rhomboid base has one base diagonal of 10 cm and the edge of the base 14 cm. The edge of the base and the prism height are in a ratio of 2:5. How many liters of water is in the container when it is filled to four-fifths of t - Gutter Sheet Metal Area
Gutters have the shape of half a cylinder. Their diameter is 16 cm, and the total length around the roof is 32.6 m. How many m² of sheet metal are needed to make them? Add 15% for connections and cleaning. - Masons Earnings Division Ratio
Three masons received 44,100 SK for plastering the house. This amount was divided according to the number of hours worked. The first received three times as much as the second, and the second received half as much as the third. Determine in what gradual r - Father 7
The father is six times older than his son. After four years, the father will only be four times older. What are their present ages? - Aquarium Dimensions and Volume
The aquarium dimensions are in the ratio a: b: c = 5:2:4. 6600 cm² of glass was used for its production. How many liters of water will fit in the aquarium if it reaches 5 cm below its edge? - 12 apples
Twelve apples and two loaves of bread cost 5.76, and 6 apples and three loaves of bread cost 7.68. How much is a loaf of bread? - Surface of cubes
Peter molded a cuboid of 2 cm, 4 cm, and 9 cm of plasticine. Then, the plasticine was split into two parts in a ratio of 1:8. From each piece, a cube was made. In what ratio are the surfaces of these cubes? - The bulbs
The bulbs are connected serially to two bulbs and one resistor. Each bulb has a resistivity of 100 ohms, and the resistor has a resistivity of 60 ohms. The voltage source in the circuit is 24 volts. Do you know what voltage to measure on individual applia - Balls Two Colors Ratio
Peter chose balls of two colors. The numbers of yellows and reds were in the ratio of 7:5, and the yellows were six more. How many did he have? - Kilometers Driven Increase
In 2016, we drove 52893.9 km, and in 2017, we drove 64035.4 km. By how many kilometers did they increase? - Flying
The airplane from Prague to Bratislava was flying at a speed of 60 km/h less and back by 70 km/h greater than the original speed. What was the original speed if the plane returned to Prague according to the timetable? - Pyramid Volume Trapezoid Base
Calculate the volume of a 1.3 dm high pyramid with a trapezoidal base. The bases are 2.3 dm and 1.6 dm long, and the pyramid's height is 1.8 dm. - Cube - surface and volume How many times does the volume of a cube increase if its surface increases four times?
- Two brothers
Two brothers want to collect 20 kg of chestnuts. If only Mark collected, he would make it in 30 minutes. It would take Milo 10 minutes longer. How long after Mark does Milo have to start collecting to be finished in 18 minutes? - Three-Day Hike Distances
Jonas and Victor went on a three-day hike starting Friday. On the first day, they covered a fifth of the total route. On Saturday, they covered three-quarters of the remaining distance, and had 20 km left for Sunday. What percentage of the total route did
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