Maths practice for 14 year olds - page 107 of 361
Number of problems found: 7217
- Wall paper
Suppose you want to paper your walls. Wallpapers are available in 4 different backgrounds colors with seven different designs of 5 different colors. In how many ways can you select your wallpaper? - Weekly student selection
There are 16 students in the class. If the teacher wants to choose two students who will be weekly, how many options does she have? - Banknote savings Lucas
Lucas saved 120 banknotes. They were 5 and 10-euro banknotes. He found that he had saved € 820. How many banknotes were there? - Male players
In the game, 15 players played, and there were six males. What percent of males played in the game? - Conductor resistance
Calculate the resistance value of the electrical conductor if it is connected to a voltage of 12 V and an electric current of 0.3 A passes through it. - Iron electrical resistance
The iron is connected to a 230 V power supply with a current of 5000 mA. Calculate the electrical resistance of the iron. - Box cube paper
The open box has the shape of a cube. We used 80 dm² of paper to glue on it. What is the volume of this box? - SMS message ratio
Jane, Patricia, and Andrea sent an SMS to Superstar. The number of messages they sent was in the ratio 4:3:2, with Andrea sending 35 fewer text messages than Jane and Patricia combined. How many text messages did all 3 girls send together? - Loader pressure change
How does the pressure value change when we load a loader with the same weight as the car? - Allan 2
Allan wants to buy a shirt regularly priced at PHP 265. The shirt Is on sale for 15% of the regular price. Which equation can be used to determine the sale price of the shirt? - Stone lever force
A person lifts a stone weighing 285 kg with the help of a lever that is supported at a distance of 30 cm from the stone. A person acts on the lever at a distance of 90 cm from the support. How much force does a person have to use to lift a stone? - Part weight ratio
Part 1 is half. 2nd part is 2/3 of 1/2. 3rd component weighs 3 kg. How much do the individual components weigh, and how much is it? - Wheel force lever
The center of force on the wheel is 1.2 m from the axis of rotation, and the load is attracted by the earth's gravitational force equal to 800 newtons at a distance of 40 cm from the axis of rotation. How much force F2 does the worker lift the wheel? - Apples
60% of first-quality apples were picked in the upper orchard, and 90% of first-quality apples were in the lower orchard. How many% of the first quality were achieved in total if the total harvest was 240 tons of apples and in the lower orchard, the harves - Perimeter - triangle
Construct triangle ABC when we know a + b + c (perimeter), height to side c, and angle gamma. - Magnetite iron production
Iron is produced in a blast furnace from iron ore. The wealthiest iron ore is magnetite, which contains 45-70% iron. How much magnetite do we need to get 3 tons of iron? - Children scooter price
Three children's scooters cost a total of 179 euros. The first was 18% more expensive than the second. The third was 20 euros more expensive than the second. Determine the price of the first scooter. - Pipe thickness
The outer circumference of the tube is 32 cm. Its length is 60 cm, its density is 8.5 g/cm3, and its weight is 9.495 kg. Calculate the wall thickness of the pipe. - Iso triangle
An isosceles triangle with a base of 8 cm. Its perimeter is 28 cm. Calculate the height of the triangle. - Cylinder cube percentage
Calculate the percentage of the cube volume that represents the volume of the cylinder inscribed in the cube. The cylinder's bases are circles inscribed on two opposite walls of the cube with an edge a = 14 cm.
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