Maths practice for 11-year-olds. - page 150 of 222

Number of problems found: 4426

Twenty
Twenty rabbits are put in 4 cells so that there are a different number of rabbits in each cell containing at least three rabbits. What is the largest possible number of rabbits in one cell?
Dropped sheets
Three consecutive sheets dropped from the book. The sum of the numbers on the pages of the dropped sheets is 273. What number has the last page of the dropped sheets?
Exactly 6134
At what average speed does a car have to travel to drive 55 km in exactly half an hour?
Average mark
In the 6th class, the average half-year mark in physics was 1.7. At the end of the year, Mathias improved his mark from 2 to 1, Ivana from 3 to 2, and Elena from 4 to 2. Paul worsened his mark from 3 to 4. The average mark of the whole class thus improved
Strawberries 6125
Friends Marika and Katka decided to prepare strawberry jam together according to the recipe. They needed 50g of sugar for 0.5kg of fruit. How many kilograms of sugar must the friends prepare if they make jam from 2.3 kg of strawberries?
Calculate
Calculate the area cm² diamond with a side length of 9.8 cm and a height on the side of 5 cm.
Naturally 6121
The ratio of the two natural numbers is 2:3. The smaller natural number from this pair is 12. Calculate the larger.
How much
How much money will we pay for 20 planks 4m long, 15cm wide, and 26mm thick when 1m³ of wood costs 4500kč?
Quadrilateral 6116
The area of a regular quadrilateral pyramid's mantle is equal to twice its base's area. Calculate the pyramid's surface if the length of the base edge is 20 dm.
Addition 6113
Find the natural numbers x and y such that: 1/2 = x / y and in addition that: x + y = 6
Map scale
The rectangular plot has a scale of 1:10000 and an area of 3 cm² on the map. What area does this plot have on a 1:5000 scale map?
Available 6094
There are a total of 110 beds in the hotel, which are available in single, double, and triple rooms, while there are three times more triple rooms than single rooms and twice as many double rooms as triple rooms. How many triple rooms are there in total i
Minutes 6093
The tower clock delays only 55 minutes in an hour. It's noon, and the clock shows the exact time. What time will they show up after four hours?
Five-crown 6091
The customer paid the amount of CZK 3,200 with the same 100-crown, two-crown and five-crown banknotes. How many banknotes did he use to pay the amount if he paid precisely the amount?
Consecutive 6090
The sum of four consecutive even numbers is equal to 108. Which of the numbers is equal to the smallest of these summands?
Largest 6089
The largest number of small cubes with an edge length of 2 cm will fit in a large cube with a volume of 216 cm³.
Multiply 6073
We first reduce the unknown number by 5, multiply by three, and finally reduce by 4 to get the number 7. What was the unknown number?
A number
A number increased by 7.9 is 8.3
Minutes 6071
What is the angle of the big hand of the watch in 20 minutes?
Difference heights
Determine the difference between the altitudes of the Sněžka peak (1,602 m above sea level) and the level of the Dead Sea (-394 m above sea level).

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