Math practice for 13 year olds - page 400 of 422
Number of problems found: 8427
- Prism
Calculate the volume of the rhombic prism. The prism base is a rhombus whose one diagonal is 47 cm, and the edge of the base is 27 cm. The edge length and height of the base of the prism are 4:3. - Skier
At this point, the first skier leads 10 km before the second skier and travels at a constant speed of 14 km/h. The second skier rides at 19 km/h. How long does it take him to catch up with the first? - Train and car
The train and the car started at a constant speed. When the train travels 87 km, the car travels 97 km. How many km does the train travel when the car travels 87 km? - President
The country has 5.3 million citizens which 2.77 million are voters. Turnout was 59.8%. President R. F. was elected from 18 candidates for president and won with 34% of votes. Calculate what percentage of the country's citizens voted R.F. as president. - Medals
How many ways can gold, silver, and bronze medals be divided among 16 contestants? - Rhombus
Calculate the length of the diagonal AC of the rhombus ABCD if its perimeter is 524 dm and the other diagonal BD has length 159 dm. - Driving school
Driving final exam involving 14 attendants. The exam consists of three parts. 4 fails the test (quiz), and 7 students fail on car skills test on the playground (slalom between the cone). The practical part of the test - driving in town in real traffic - a - Areaf of ST
It is given square ATRD with side |TR|=16. Calculate the area of the triangle ADU if vertex U lies online RT. - Waiting room
In the waiting room are people and flies. Together, they have 21 heads and 102 legs (fly has six legs). How many people and flies are in the waiting room? - Certificate
There are 21 students in a class. The mathematics score wasn't worse than 2. The average score in mathematics was 1.0952. How many students have a score of one, and how many have a score of 2? - Unions
Calculate how much money per year would go to the treasury of unions if 396 thousand employees join unions with an average net salary of 993 euros and if union membership costs 1% of the net monthly salary. - Icerink
A rectangular rink with 68.7 m and 561 dm dimensions must be covered with a layer of ice 4.2 cm thick. How many liters of water is necessary for ice formation when the ice volume is 9.7% greater than the volume of water? - Cyclists
The cyclist who rides at an average speed 20 km/h travels a trip distance 13 min before the cyclist who rides at an average speed 15 km/h. What is the length of this cyclist trip(distance in km)? - Louvers
The company charges for office equipment louvers total 287 Eur. From the delivery, the bill is obvious that the louvers are 63 Eur more expensive than their installation. What percentage of the total charged is the installation of louvers? - Two wine
In the ratio of 2:1, mixed wine solution cost 4.4 USD. In the ratio of 1:2, mixed wine solution costs 4.8 USD. How much does a liter of each wine cost? - Lorry
The lorry was loaded with 30 boxes of 24 kg. How many boxes with weight 48 kg can be loaded if the total load must be the same? - Sale
If the product was twice price cut by 5%, what percentage was the price cut in total? - Road repair
Road repair took 13 days for 39 workers if they worked 5 hours a day. How many days take to repair the same road 24 workers if they work 7 per day? - Isosceles III
The base of the isosceles triangle is 18 cm area 250 cm². Calculate the perimeter of this triangle. - XY triangle
Determine the area of a triangle given by line 2x-4y+47=0 and coordinate axes x and y.
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