Maths practice for 12-year-olds - page 343 of 359
Number of problems found: 7168
- Metallurgical enterprise
Metallurgical company daily produces 501 tons of cast iron. How many tons of coke does it burn to melt cast iron when 14 tons of cast consumes 10 tons of coke? - Square
If we increase one side of the square by its one-half, then the square perimeter increases by 4 cm. What is the side of the square? - Accidents
The count of accidents in 1991 caused 8444 women, which is 9%. How many men caused the accidents? - Lie/do not lie
The rule f(x) = -x-10 gives the function. Find whether point C[5; -15] lies on this function. Solve graphically or numerically and give reasons for your answer. - Simple interest
Peter put into bank 853 euros deposit. After 7 years on account, overall was 984 euro. What was the interest rate if the bank added simple interest? - University bubble
You'll notice that the college is up slowly every other high school. Many people in Slovakia/Czech Republic study political science, mass media communication etc.. Calculate how many times more does a clever 24-year-old mason with a daily net income of 16 - Coffee
The coffee from the machine costs 31 cents per cup. Coffee is 20 cents more expensive than the cup. How much is the cup? - The pot
The pot is in 1/3 filled with water. The bottom of the pot has an area of 329 cm². How many centimeters rise in water level in the pot after adding 1.2 liters of water? - Word problem
348 students were on holiday in Hungary. 133 bought pizza, chips 28 pupils, 25 pupils bought soda, butter 26 pupils, 15 pupils fruits, vegetables 29 students. How much pay for all the food, if every meal costs 5.3 euros? - 7 triangle
The triangle area is 86.7 cm². find the side length if appropriate height h = 36.15 cm. - Diplomas
Zuzaně helped write out diplomas. Issuance first took 3.3 minutes, each next 2.3 minutes. How much time will it take to write out n=7 diplomas (including the first) at this pace? - Column
The vertical pole high 7 m tall broke, and its toe fell 4.7 m from the bottom of the pole. At what height above the ground does the pole break? - Water tank
The water tank-shaped cuboid has a width of 2.3 m and a length twice as large. If water flows into 19 liters of water per second during 52 minutes, how high will it reach? - Car range
Calculate the maximum range of a car if you can spend 5 euros, diesel costs 1.6 EUR/l, and the car's fuel consumption is 5.4 l/100 km. - Washing machine
The price of the washing machine decreased by 10% and then by 53 € due to small sales. After two price decreases, cost € 310. How much did it initially cost? - Cups
We have three cups. In the cups, we had fluid and boredom we started to shed. 1 We shed one-third of the fluid from the second glass into the first and third. 2 Then, we shed one-quarter cup of liquid from the first to the second and to the third. 3 Then, - President
The country has 5.3 million citizens which 2.77 million are voters. Turnout was 59.8%. President R. F. was elected from 18 candidates for president and won with 34% of votes. Calculate what percentage of the country's citizens voted R.F. as president. - Rhombus
Calculate the length of the diagonal AC of the rhombus ABCD if its perimeter is 524 dm and the other diagonal BD has length 159 dm. - Garden
The rectangular garden is 72 m long and 25 m wide. Calculate by how much m² its area will be reduced if it is surrounded by an ornamental fence 50 cm wide. - Driving school
Driving final exam involving 14 attendants. The exam consists of three parts. 4 fails the test (quiz), and 7 students fail on car skills test on the playground (slalom between the cone). The practical part of the test - driving in town in real traffic - a
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