Maths practice for 11-year-olds. - page 211 of 221
Number of problems found: 4414
- Wood
Wood cube with edge 9 cm weights 0.593 kg. What weight have 10, 100, and 1000 these cubes? - Triangle
By calculation, determine if it is possible to construct a triangle with sides 10 21 19. - Working time - shortening
The media often speculates about the change (especially to shorten) the working time of the five-day, eight-hour working week to another working model. Calculate how many hours the employee would have to work a day at 3-day work week if he must work the s - 6-gon
The perimeter of a regular hexagon is 154. Calculate its circumradius (radius of a circumscribed circle). - Well
A rope with a bucket is fixed on the shaft with the wheel. The shaft has a diameter of 45 cm. How many meters will drop bucket when the wheels turn 7 times? - Knight
Knight passed 36 km long track in 144 minutes. What was his average speed? - Shaving
The mathematical problem from Sunday evening. If my beard grows at 0.42 mm per day and my length is 19.9 mm, how long do I not shave? - Complementary angles
Two angles are complementary. If one angle measures 39°, what is the measure of the second angle? - Flowerbed 2
Around the square flower bed in a park is a sidewalk about 1.3 m wide. The area of this sidewalk is 246 m². What is the area of the flowerbed? - Divers
25-member group of divers carries the air for 10 hours of diving. 2 members of the expedition were sick or weren't coming. How many hours is sufficient air to other divers? - Fractions
Sort fractions z1 = (20)/(9); z2 = (10)/(21); z3 = (15)/(14) by their size. Write the result as three serial numbers 1,2,3. - Pool coating
How many tiles 20 cm × 15 cm need to coat the bottom and sidewalls of the pool with bottom dimensions 75 m × 10 m if the pool can fit up to 1402500 liters of water? - Angles
Which of those angles is obtuse? - Ratio
Unfold number 3690 in the ratio 15:11:4. - Triangle radians
The size of two internal angles of a triangle ABC is α=6/18π and β=7/18π. Calculate the size of the third angle. - Square
If we increase one side of the square by its one-half, then the square perimeter increases by 4 cm. What is the side of the square? - Roman numerals 2-
Subtract the number written in Roman numerals. Write the results as Roman numbers. - University bubble
You'll notice that the college is up slowly every other high school. Many people in Slovakia/Czech Republic study political science, mass media communication etc.. Calculate how many times more does a clever 24-year-old mason with a daily net income of 16 - Coffee
The coffee from the machine costs 31 cents per cup. Coffee is 20 cents more expensive than the cup. How much is the cup? - Cast brass
The brass cast weight was 3.77 kg. It had turned into piston weight 3.58 kg. How many grams of brass were turned off?
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