Maths practice for 11-year-olds. - page 106 of 224
Number of problems found: 4480
- Flowerbed stone calculation
The gardener filled the flowerbed with crushed stone in the shape of an equilateral triangle with an 8-m-long side. If 25 kg of crumb was consumed per 1 m² of the area, how much crumb was used for the whole flower bed? - Triple density
How many times does the density of a steel pipe increase if we triple its length? - Class trip students
Of the 35 students in the 7A class, there were five-sevenths on the trip. How many students stayed at home? - Escalator distance calculation
The escalator in the subway is moving at a speed of 0.7 m/s. Determine his debt if the time from the boarding to the disembarkation of the passenger elapses 62.3 s - The sum
The sum of five consecutive odd numbers is 75. Please find out the sum of the second and fourth of them. - Aquarium height
How high does the water in the aquarium reach if there are 36 liters of water in it? The length of the aquarium is 60 cm, and the width is 4 dm. - Number multiplication puzzle
The number x decreases by 10, the result is multiplied by six, and you get the number 18 - Pizza palace
Josh is at Enzo's Pizza Palace. He can sit at a table with 5 of his friends or at a different table with seven friends. The same size pizza is shared equally among the people at each table. At which table should Josh sit to get more pizza? (write the answ - Room wallpaper calculation
How many square meters of wallpaper will we need to cover the walls of a room with dimensions of 3 m and 4 m if the room height is 2.5 m? A door with dimensions of 90 cm and 2 m leads to the room. There is one window 1 m wide and 1.5 m high. - Bun basket calculation
There were buns in the basket on the table. Josef ate half of the half, Eva ate the rest, Katka ate two buns, and Dunčo ate a quarter. How many buns were on the table? - Aquarium water height
The bottom of the aquarium measures 30 cm and 50 cm. To what height will the aquarium be filled if 60 liters of water are poured into it? - Pizza circumference
Calculate the circumference of a pizza with a diameter of 62 cm. How big is the plate on which it is placed when it covers it? - Divisors of 560
Which of the numbers 5, 6, 7, 14, and 15 are divisors of 560? Please justify the answer. - Barrel water remaining
There were 50 liters of water in two barrels. Katka took several liters of water from the first and watered the vegetables in the garden. From the second, Kamil took as much water as was left in the first barrel and watered the flowers in the garden. How - The missing digit Complete the missing digit in the number 3 ∗ 43 to form a number divisible by three. If there are multiple options, list them all. (The omitted digit is marked with the symbol ∗. ) Answers must be justified!
- Prime factors
Factor the number 6600 into the product of prime numbers. - Room painting cost
In the block-shaped room, the floor has dimensions of 4 m and 3.5 m. The volume of this room is 35 m³. How much will it cost to paint this room if we pay €1.2 for 1 m² of paint (remember that we will not paint the floor)? - Consecutive number sum
Five consecutive numbers give the sum of 220. Identify the smallest of them. - Robot kit savings
They have a third of everything in the kit store. Pepin has 1,200 crowns saved and wants to buy a space robot kit, which costs 1,950 crowns before the discount. How many crowns does he still have to save? - Cuboid to cube
A cuboid with dimensions of 9 cm, 6 cm, and 4 cm has the same volume as a cube. Calculate the surface of this cube.
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