Maths practice for 11-year-olds. - page 159 of 222

Number of problems found: 4421

Yogurt calcium
100g of yogurt contains 150mg of calcium. How many kg of yogurt would we have to eat to meet the daily dose of calcium 1000mg?
Average distance
The tourist section covered 14.5 km in 2.5 hours. What distance did he cover on average per hour?
Chimney covering
How many m² of sheet metal is needed to cover 4 m high chimneys with a rectangular cross-section with 2.5 m and 1.2 m dimensions? Add 1/20 to the folds.
Colored paper
Can a 4 cm, 3 cm, and 2 cm block be glued with a colored quarter of paper measuring 7 cm and 8 cm?
Soil transport
Excavated soil increases the pile's volume by 1/3. Can a 6 m, 2.5 m, and 1.8 m truck body be used to transport excavated soil to a 5 m, 2 m, and 1.5 m block-shaped pool?
Forest area
The Earth's surface is approximately 510,000,000 km². The forest area is about 38,000,000 km². Write a fraction in the basic form. What part of the Earth's surface is formed by the forest?
Fraction of Fish Endangered
Of the 65 freshwater fish species in Europe, 45 are at risk of extinction. In the basic form, express which parts of the fish are in danger of extinction.
Brick weight
Half the weight of a brick plus 20 pounds equals 1/3 the weight of the brick plus 30 pounds. How much does the brick weigh?
Expression puzzle
Add a plus sign minus times divided by two brackets: 5 5 5 5 = 15
Dance participation
The dance group is preparing for a performance. The program includes dances in pairs, fours, and fives. How many members does a group have to have to dance all these dances and have all their members participate in each dance?
On Children's
On Children's Day, the organizers bought 252 pieces of chewing gum, 396 candies, and 108 lollipops. They want to make as many of the same packages as possible. Advise them what to put in each package and how many packages they can make this way.
Card sum puzzle
On the table lay eight cards with the numbers 2, 3, 5, 7, 11, 13, 17, and 19. Frank chose three cards. He added the numbers on them and found that their sum was 1 more than the sum of the numbers on the remaining cards. Which cards could have been left on
Pamela
Lara Pamela spends her salary of 3000 on food, clothing, recreation, and savings, which are in the ratio of 48:20:15:37, respectively. How much does he spend on savings?
Suzan
Susan's age will be after 12 years, four times as much as twelve years ago. How old is Susan now?
Powder washes
Mrs. Janka bought washing powder that weighed 5 kg. The powder is enough for 50 washes. However, she decided to fill the measuring cup with powder only three-fifths of the volume. How many washes does the powder last for her?
Ľé sweets
There are 20 sweets in the bag. Some are chocolate, other coconuts, and the remaining marzipan. Chocolate is four times more than coconut. Marzipan's less than chocolate. How much is in a bag of coconut sweets?
Mixed2improper
Write the mixed number as an improper fraction: 166 2/3
Deca-kilogram
70g of yeast is needed for 30 days of flour. How many dags of yeast are required for 1.5 kg of flour? (note: the decagram has the mark dag and not dkg - it would be a deca-kilogram)
Triangle Height from Area
The parallelogram has a side 6 cm long, and the height on this side is 4 cm long. What is the height of an isosceles triangle with a base 6 cm long and the same area?
Spending Comparison
Milo had 150 CZK and missed 50 CZK. Andrew had CZK 200 and missed CZK 70. Which one spent most of their money?

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