Maths practice for 12-year-olds - page 301 of 361
Number of problems found: 7210
- Determine 3013
An unknown number increased by 300% equals 62. Determine an unknown number. - Conva
How many liters of water fit into the shape of a cylinder with a bottom diameter of 20 cm and a height of 45 cm? - Excavate 3008
The well will have a diameter of 2 m and a depth of 7 m. How many cubic meters of soil are needed to excavate a well? - Insulation
Two workers insulate the house for five days. After the first day of working together, only one worker continue to cover the house. How many days will the house be insulated if every worker has the same work tempo? - Solve
Solve this direct relation by the triplet: 0.25h. .. . . .. .. . . .. .. .. 3 pcs 6.5h. .. . . .. .. . . .. .. . . .. .. x pcs - Bridge piers
One-quarter of the bridge pier is sunk into the ground. Two-thirds are in the water. Protruding above the water is 1.20 m long. Determine the height of bridge piers. - Smallest internal angle
Calculate what size has the smallest internal angle of the triangle if values of angles α:β:γ = 3:4:8
- Rectangular trapezium
Calculate the perimeter of a rectangular trapezium when its area is 576 cm² and side a (base) is 30 cm, height 24 cm. - Percentage - fractions
About what percentage must we increase the number 1/6 to get the number 1/3? - Class
In the 7C class, there are ten girls and 20 boys. Yesterday was missing 20% of girls and 50% of boys. What percentage of students are missing? - Pool
The pool is filled with two water supplies. The first supply fills the pool for nine hours and the second for six hours. How many hours will it take to fill the pool when the water flows in through the first supply for three hours, and then we open a seco - Average height
In a class are 34 students. The average height of the students is 165 cm. What will be the average height of students in the classroom when two pupils, tall 176 cm and 170 cm, move from this school/class? The average height in meters of all the students i - Connecting 2990
We use 540 m of mesh, of which 20% are for connecting corners. How much mesh did we use to join the corners? - Salary increase
Ms. Merry's salary increased by 15%, which was 83 euros. What should you pay before the increase? - Stew
To prepare stew for ten loggers, we need 2.5 kg of potatoes, 0.8 kg of meat, 18 dag of flour, 30 dag onion, and one bread. What is the required amount of raw materials for 50 participants in camps where loggers eat 1.5 times more than a camp participant?
- Tmp workers
Three temporary workers cleaned 60 m of the walkway in 5 hours. How many meters of the walkway were cleared by seven volunteers for eight hours? - Train expres
At 8.00, the express Tatry started from Bratislava to Poprad. Cities are distant, 340 kilometers. At the same time, it started from Poprad Express Danube to Bratislava. Express Tatry's average speed is 80 km/h, Danube 90 km/h. At what distance from Poprad - Tram lines
Trams of five lines are driven at intervals of 5,8,10,12, and 15 minutes. At 12 o'clock, come out of the station at the same time. How many hours will we all meet again? How many times has each tram passed for this stop? - Mathematics 2980
More than 20, but less than 40 pupils go to 1.S. A third of the pupils wrote the mathematics test with a one, a sixth with a two, and a ninth with a three. No one got a high five. How many 1.S pupils wrote the test with a four? - Bus lines
Bus connections start from the bus stop on its regular circuit: No. 27 bus every 27 minutes and No.18 bus every half hour. If the bus stop meets at 10:15 a.m., what time do these two bus lines run?
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