Examples for secondary school students - page 183 of 237
Number of problems found: 4730
- Regular triangular prism
Calculate the surface area of the body of a regular triangular prism when the length of its base edge is 6.5 cm, and its height is 0.2 m. - Scale reduction
Write down the scale that the displayed item has been reduced to one-third. - Potatoes bags
I have three bags with 21 kg of potatoes. The first bag has 5.5 kg more potatoes than the second bag, and the third has 0.5 kg more potatoes than the second bag. Determine the weight of each bag. - Sawmill factory
Peter works in the factory. The bus stop is 10 km from the factory. Therefore, when the bus arrives for Peter, the driver always leaves the factory and takes him to work. They arrived at the saw exactly at 8:00. Today, the bus arrived 11 minutes earlier, - Statistical example
Calculate in the set of patients (attached table 1) A) using the table editor EXCEL B) with the program "Social Science Statistics Calculator" (SSSC) on the web page a) the average age of the patients and the standard deviation (STDEV) b) the average dura - Sum probability
We have natural numbers 3, 4, 6, 10, and 12. Calculate the probability that the sum of three randomly selected three different numbers is less than 20. - Above Earth
To what height must a boy be raised above the earth to see one-fifth of its surface? - Number power
We have a number. If we divide its fourth power by its square, we get the number 0.25. Find this number. - Inverse function
Perform the inverse function from f: y = 4x + 5. - Airplane
An aviator can see a part of the Earth's surface with an area of 200,000 km². How high is he flying? - Geometric sequence
A1 + a3 = 15 a1 + a2 + a3 = 21 Calculate a1 and q (quotient of the geometric sequence). - Water tank
The water tank has a cylindrical shape with a base diameter of 4.2 m and is 80 cm deep. How many minutes will it take to fill it 10 cm below the edge of the tank if water flows 2 liters per second? - Water reservoir
The reservoir shape of a cylinder has a diameter of 8 m and a height of 2.8 m. The device indicates that the reservoir contains 800 hectoliters of water. Calculate how much % of the volume is used. - Variance value
What is the value of the variance of the data in the file if the calculated standard deviation = 2? a) Dispersion = 6 b) Dispersion = 4 c) Dispersion = 9 d) Dispersion = 2 - Alcohol mixture
We have to produce 0.2 kg of 60% alcohol from 55% and 80% alcohol. How many of them do we use in the solution? - Alcohol mixing How much 55% alcohol do we need to add to 1500 grams of 80% alcohol to produce 60% alcohol? How much is 60% of alcohol produced?
- Group combinations
The group has 12 red girls and 25 blue girls in costumes. How many of them can we put together a group of 6 girls so that the four girls have red outfits? - Vacation
Karel and his parents flew on vacation. When checking in at the airport, their 3 pieces of luggage had a total weight of 44 kg. Father's luggage weighed three times as much as Karel's luggage, and mother's luggage weighed half as much as father's luggage. - CuZn
Brass is an alloy of copper and zinc. The 10-centimeter brass cube weighs 8.6 kg. Copper density is 8930 kg/m3, the zinc density is 7130 kg/m³. Calculate how many kilograms of copper and zinc a cube contains. - Two numbers
The sum of two numbers is zero. A quarter of the first equals half of the second. What are the numbers?
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