Maths practice for 12-year-olds - page 332 of 359
Number of problems found: 7168
- Trapezoid perimeter
The bases of the isosceles trapezoid measure 110 m and 50 m. The distance between the bases is 40 m. Calculate its circumference. - Angles ratio
In an ABC triangle, is true relationship c is less than b, and b is less than a. Internal angles of the triangle are in the ratio 5:4:9. The size of the internal angle beta is: - Internal angles
One interior angle of triangle JAR is 25°. The difference between the other two angles is 15°. Find the measures of these angles. - 9-gon
The sum of interior angles of 9-gon is: - The chord
A chord passing through its center is the side of the triangle inscribed in a circle. What size are a triangle's internal angles if one is 40°? - Aunt
Annie's aunt is 35 years old, and Annie is 14 years. For how many years will aunt have twice as many years as Annie? - Little hand
What angle shifted the little hand on the clock after one hour and 38 minutes? - Clock Tower
What angle is between the hands-on Clock Tower when it shows 17 hours and 35 minutes? - Greenhouse
The Garden plastic greenhouse is shaped like a half-cylinder with a diameter of 6 m and a base length of 20 m. At least how many m² of plastic is needed for its cover? - Cuboid
How many times will the volume of a cuboid increase if one dimension is twice larger, the second dimension three times larger, and the third dimension four times lower? - Water
The lawn has an area 1571 m², rained 5 mm of water. How many liters of water rained? - Medians in triangle
The median of the isosceles triangle is 3 cm long. If its perimeter is 16 cm, determine the size of its sides. - Lunch
Jane eats the whole lunch for 30 minutes. Which part of the lunch does he eat in 180 seconds? - Step length
Katy, whose step measures 50 cm, counted 294 steps from her house to her aunt's. If his step measures 70 cm, how many steps will Katy's father take to his aunt? - Feed for horses
In the kennel, have feed for two horses for 21 days. The station brought an additional five horses. How many days will feed for all the horses last if they have the same daily ratio? - Coal
The daily consumption of 1.6 tons of coal is sufficient to supply the boiler for 42 days. How long is sufficient to supply when it burns only 1.2 tons of coal a day? - Florist's
The flower shop has 72 white and 90 red roses. How many identical bouquets can they most tie together so that all the roses are used? - Tailor master
There are less than 50 m of textile in the tailoring workshop. No textile is left when cutting on a blouse (consumption 1.5 m). No textile is left when using a cloth (consumption of 3.2 m). How many meters of textiles are in a tailor's workshop? - Painting
Joseph and Frank painted the bench for four hours. If four friends helped him, how many hours would it take him to work? - Mukls
The six workers' working group would order jobs completed within 21 working days. How many workers must be added to complete a contract in 14 working days?
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