Maths practice for 12-year-olds - page 333 of 348
Number of problems found: 6956
- Parquet floor
Three workers laid the parquet floor for 2.301 hour. The first would do this work alone 7 hours, the second in 6 hours. For how many hours would this work for the third worker if he worked alone? - Inflow - outflow
The tank will fill by inflow for 56 minutes and empties by outflow for 77 minutes. How long does it take to fill the tank if it is open to inflow and outflow? - OPT
What is the perimeter of a right triangle with the legs 11 cm and 24 cm long? - Air
The room is 35.6 m long, 19.6 dm wide, and 591 cm high. How many people can simultaneously be in this room if, for hygiene reasons, is calculated 5000 dm³ of air per person? - Triangle radians
The size of two internal angles of a triangle ABC is α=6/18π and β=7/18π. Calculate the size of the third angle. - 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? - 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? - 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 cars, if you can spend 5 euros, the diesel price is 1.6 Eur/l, and car 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? - 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.
Do you have unsolved math question and you need help? Ask a question, and we will try to solve it. We solve math question.
