Maths practice for 11-year-olds. - page 106 of 226
Number of problems found: 4508
- Track circuit calculation
The competitor runs on a circular track with a radius of 86 m. How many meters will he run three circuits? - Gear turn calculation
Two gears – one smaller and one larger rotate so that the teeth of both wheels mesh together. The first wheel has 18 teeth, the second 27. How many times does each wheel turn before returning to its starting position? - Driving distance calculation
If I drive 30 km in two hours, how many kilometers will I drive in 2.5 hours if I drive at the same speed? - Balloon fabric calculation
How much fabric is needed to sew a spherical hot air balloon with a diameter of 15 m? How much air is needed to inflate the balloon? - Semicircle
Calculate the length of a semicircle with a radius of 6 cm. - Square tile space
What is the smallest square space we can tile with tiles measuring 25 x 15 cm, knowing there will be no need to cut them? How many tiles will we use? - The plan
The plan of the housing estate is on three scales 1:5000,1:10000,1:15000. The distance between two points on a plan with a scale of 1:10000 is 12 cm. What is this distance on the other two plans? What is this distance? - 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 7 A 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 its length 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. - 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, Eve ate the rest, Kate ate two buns, and Dunčo ate a quarter. How many buns were on the table? - 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? - Mr. Michal
Mr. Michal commutes to work and back on the motorway. Sometimes he is in a hurry and exceeds the permitted speed, at other times he follows the rules. Sometimes on the motorway the speed is checked by radar, and at other times not. a) how many different c - Barrel water remaining
There were 50 liters of water in two barrels. Kate took several liters from the first barrel and watered the vegetables in the garden. From the second barrel, Kevin took as much water as was left in the first barrel and watered the flowers. How many liter - 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! - 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)?
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