Maths practice for 12-year-olds - page 101 of 355
Number of problems found: 7085
- Prism height rhombus
The quadrilateral prism has a volume of 720 cm³. Calculate the height of the prism if the base is a rhombus with a side 16 cm long and a corresponding height of 5 cm. - Water level
In the pool, which is 15 m long, 6 m wide, and 2 m deep, the water level is 20 cm below the edge. How many hectoliters of water are in the pool? - Sugar bowl cubes
A) Can the maximum number of sugar cubes with a volume of 3375 cubic mm fit in a new cube-shaped sugar bowl with internal dimensions of 12 cm, 6 cm, and 3 cm? B) Mom poured sugar cubes into the new sugar bowl, filling it completely. She estimated that the - Gas pipeline excavation
During the construction of a 140-meter-long gas pipeline, a pit with vertical walls 1.5 m deep and 1 m wide must be created. A) How many cubic meters of soil must be dug up? B) We spread the excavated soil evenly on a field with dimensions of 70 m and 120 - Mang lino's
Mang Lino's rice harvest yielded 15 1/4 sacks of rice, while Mang Pepe's harvest yielded 19 3/4 sacks of rice. Thus, Mang Pepe harvested 19 3/4 sacks more rice than Mang Lino. - Egg cooking time
If eight eggs are cooked in 10 minutes, how long will it take to cook 28 eggs? - Aquarium fish water
Peter has an aquarium at home in the shape of a cuboid with 6 x 3 dm bottom dimensions and a height of 4 dm. They filled the aquarium with water according to the seller's order, 5 cm below the edge. A) The maximum number of fish can be raised in it if 1 f - Milk carton weight
One milk container weighs 80g. What is the weight of a package of 12-liter milk cartons? - Cube-shaped crates
A shipment of 2560 cubic dm of dried Secret arrived in eight identical cube-shaped crates. What is the height of one crate if it has a square base with an edge length of 8 dm and each crate is filled to the brim? - Measuring aquarium We poured 3 liters of water into an empty aquarium measuring 30x20 cm and 25 cm high. What is the level?
- Grid symmetry painting
How many more squares in the grid in the picture need to be painted to make it centrally symmetrical? square - x x; o; o; x o; o; x; o x; o; o; o o; x; o; o This is a sketch of a grid where the colored squares are x. Thank you, Lucy - PIN code options
Emil forgot the PIN for his payment card. It knows that it is four-digit, starts with 1, ends with 2, and does not repeat digits; its digit sum is 15. How many such codes are there? List all the options. - Stork average speed
The stork moves to Africa for the winter for an average of 10 hours a day and flies around 650 km. At what average speed does the stork move? - Quadrilateral ABCD
Construct a quadrilateral ABCD if AB = 10cm, AD = 6cm, DC = 6.5cm and angle BCD = 90 degrees. - Diamond area perimeter
What is the area and circumference of a diamond whose diagonals are 7 dm, 12dm in length, and 6 dm in height? - Stool cover fabric
Susan has an old stool - a cube with an edge length of 80 cm. She wants to sew a new cover for her. How many square meters does the fabric consume, considering adding 15% for stitching and folds? - Number divisibility replacement
Which number should replace the letter X so that the number 7618X is divisible by three and four? - Number divisor sum Calculate the sum of all divisors of the number 70.
- Sauna wood paneling
In the basement, they have a cube-shaped room with an edge length of 2.5m, which has no windows, only a door with dimensions of 2*1m. They decided to make a Finnish sauna in it. How many square meters of wood paneling will they need? - Parking car capacity
The department store has a rectangular car park with a length of 48 m and a width of 65 dm. How many cars can there fit when each car needs 2.5 m²?
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