Maths practice for 11-year-olds. - page 129 of 222

Number of problems found: 4421

Water Flow Pool Pump
Fifty liters of water should flow into the pool every minute. In the event of a pump failure, only 0.4 (4/10) of that amount flowed. How many liters of water flowed in every minute?
Last page
Two consecutive sheets dropped out of the book. The sum of the numbers on the sides of the dropped sheets is 154. What is the number of the last page of the dropped sheets?
Devices Sold Abroad Remain
The factory produced 420 devices per month. They will sell 0.6 of them abroad. How many devices will remain in the Czech Republic?
Flower leaf drying
After drying 1 kg of flowers, 0.17 kg of dried flowers remained. After drying 1 kg of leaves, 0.46 kg of dried leaves remained. How many kilograms of water evaporated by drying 1 kg of flowers and 1 kg of leaves?
Book purchase cost
A father bought books for his children's birthdays. Zdenka purchased the book for 24.60, and Milo bought the book 6.70 more expensive. How much did the father pay for both books?
Expression equality puzzle
For what values of x is the value of the expression 5x + 11 equal to that of the expression 7x + 31?
Blood Pumped by Heart
At 23:45, the pump pumps 435.4 liters of blood. How many liters of blood does he pump per day? How many liters of blood does he pump in a week?
Formula One Laps Kilometers
Formula 1 drivers drive on the training circuit. After one-third of the 42 laps, he must go into the pit. How many laps have they covered by then? One circuit measures 15 km. How many kilometers have they traveled, and how many kilometers do they still ha
Playground Shorter Side
The playground has a rectangular shape. The length of the line around its perimeter is 440 m. The longer side of the course is 140 m long. How many meters does the size of the shorter side of the pitch measure?
Prism 4 sides
Find the surface area and volume of a four-sided prism high 10 cm if its base is a rectangle measuring 8 cm and 1.2 dm.
Walking
The boy walked about 8.5 km in an hour. How long will it take to walk a distance of 32 km if he takes two breaks of 30 minutes during the route?
Brick density calculation
Hansel weighed a broken piece of brick and found that it weighed 48 grams. Using a measuring cylinder, he determined its volume at 30 cm³. What is the density of the brick?
Hares and pheasants
After the hunt, hares and pheasants lie in the field. There are a total of 80 heads and 190 feet. How many hares and how many pheasants? (please, without equations)
Reading Book Pages Schedule
Roza calculated that if she read ten pages a day, she would read the whole book in 18 days. After a week, however, she decided to read one more page a day. How many days will he read the entire book?
Three People Spending Ratio
One paid 500 CZK. Three paid in a ratio of 3:4:5. The smallest expenditure was CZK 360. How much was the total expenditure?
Step count
George makes steps 60 cm long. He will take 1530 steps on the way to school. How many steps will his father take to the class meeting if he makes steps 85 cm long?
Driver Speed Increase Time
The driver covered the distance between the two cities in 2 hours at an average 75 km/h speed. How did he change speed to get 20 minutes faster?
Cleaning the pool
The swimming pool is 25 m long, 12 m wide, and 2 m deep. The walls and bottom of the pool require regular cleaning. The company that cleans the pool charges CZK 50 per 1 square meter. How much does the owner pay for cleaning the pool?
The King
The King wants to divide his sons equally. He has 42 rubies and 45 diamonds. How many sons and how will they share them?
Steps Around Rectangular Course
Monica has a step 5 dm long. How many steps will she take before going around a rectangular course 500 dm long and 200 dm wide?

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