Maths practice for 12-year-olds - page 297 of 308
Number of problems found: 6157
- Quadrant II
Calculate the radius of the quadrant, which area is equal to the area of the circle with radius r = 15 cm. - Coin and die
Flip a coin and then roll a six-sided die. How many possible combinations are there? - Inheritance
After death, the father (♱ 54) remained the mother (his wife) and 5 children. Inheritance by law is that the first mother will automatically get half of the property and the other half inherited by heirs, the mother and her 5 children by the same share. C - Tiles
How many 37 cm square tiles will cover a floor 11.84 m by 17.39 m?
- Count of roots
How many solutions have equation x * y = 7757 with two unknowns on the set of natural numbers? - Efficiency
A certain device consumes 28 kW and delivers 14 kW. Find its efficiency. - Base
Compute the base of an isosceles triangle, with the arm a=20 cm and a height above the base h=10 cm. - Homework - jumps
Sasha jumped 131 cm Peter 4 cm more than Jirka. Jirka 6 cm less than Misha. Misha 7 cm less than Filip, and Filip is half as much as Sasha and Petr together. How far does each jump? - Road embankment
Road embankment has a cross-section shape of an isosceles trapezoid with bases 5 m and 7 m and 2 m long leg. How many cubic meters of soil is in an embankment length of 1474 meters?
- IS trapezoid
Isosceles trapezoid arm measured 35 cm. Height is 30 cm, and the middle segment is 65 cm. Find the length of its bases. - Bridge
The bridge arc has a span of 159 m and a height of 14 m. Calculate the radius of the circle arc of this bridge. - The circle arc
Calculate the span of the arc, which is part of a circle with diameter d = 11 m and its height is 5 m. - Bakery
How heavy must prepare bread at a bakery if a bread loses 18% of water during baking and after baking must have 1.7 kg? (Calculate to the nearest gram) - Railways
Railways climb 2.8 ‰. Calculate the height difference between two points on the railway distant 5997 meters.
- Tereza
The cube has an area of base 144 mm². Calculate the edge length, volume, and area of its surface. - Pool
Mr. Peter builds a pool in the garden in the shape of a four-sided prism with a rhombus base. The base edge length is 8 m, and the distance between the opposite walls of the pool is 7 m. The estimated depth is 144 cm. How many hectoliters of water does Mr - Area of RT 2
Calculate the area of a right triangle whose legs have a length of 6.2 cm and 9.8 cm. - Pure quadratic equation
Solve pure quadratic equation -7x² +4 = 0. - LCM
What is the least common multiple of 5, 50, 14?
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