Maths practice for 11-year-olds. - page 130 of 224

Number of problems found: 4479

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 Milan 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 440m. The longer side of the course is 140m 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
Jeníček 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
Monika has a step 5dm long. How many steps will he take before going around a rectangular course 500dm long and 200dm wide?
Difference of a half
Calculate three times the half difference of 7.5 and 2.1,
Area of rectangle
If we increase the length by twice and decrease the width by half, how many times will we increase the area of the rectangle?

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