Math practice for 13 year olds - page 331 of 356
Number of problems found: 7120
- Hockey players
After we cycle, five hockey players sit down. What is the probability that the two best scorers of this crew will sit next to each other? - Sinus
Determine the smallest integer p for which the equation 4 sin x = p has no solution. - Two diggers
There are two diggers. One digger digs a pit 77 hours per second, digging 1.2 times faster. a) how long did digging a pit with a second digger take? b) how long did it take to dig together? - Snowman 2
On the medal, which has the shape of a circle with a diameter 18 cm, is sketched a snowman so that the following requirements are met: 1. snowman is composed of three circles, 2. space over the snowman is the same as under it, 3. diameters of all circles
- Hexagon 5
The distance of parallel sides of regular hexagons is 61 cm. Calculate the length of the radius of the circle described in this hexagon. - Medal
Calculate the approximate weight of the gold Olympic medal if its diameter is 7 cm and its thickness 6 mm. The density of gold can be found in tables or on the Internet. - Two workers
Two workers will do certain work for 12 days. After eight days of working, one was removed, and the other finished the job alone in 10 days. For how many days would you do this work alone for each worker? - The dice
What is the probability of events if we throw a dice rolled less than 1? - Pedestrian up-down hill
The pedestrian goes for a walk first on the plane at 4 km/h, then uphill at 3 km/h. Then it is in the middle of the route, turns back, and goes downhill at 6 km/h. The total walk was 6 hours. How many kilometers went pedestrians?
- Electrics - conductor
The wire is 107 meters long at 0 °C, and at every temperature increase of 1 °C, the length increases by 0.15 mm per 1 m length of wire. Determine a function that represents the wire's overall length as a temperature function. What is the length of the wir - Playground
Fencing square playground cost € 464; 1-meter cost € 19. What is the area of the playground? - Workman - shift
The worker produces 300 components per shift. If his performance gradually increased by 3 components every shift, how many components would be produced in the 18 shifts? - Racing track
On the racing track, circling three cars. The first passes one circuit for 19 seconds, the second for 12 seconds, and a third for 9 seconds. a) Calculate the number of seconds since starting to catch all three cars together for the first time again across - Snowman
In a circle with a diameter of 40 cm are drawn three circles (as a snowman) where: its diameters are integers, each larger circle diameter is 2 cm larger than the diameter of the previous circle. Determine the snowman height if we wish for the highest sno
- Map 2
At what scale is a map made if the distance 8.2 km corresponds to the map segment 5 cm long? - Loan
If you take a bank loan of $ 11000 and want to repay it after the year, you must pay the total amount of $ 11242. What is the annual interest rate on this loan? - Cosine
The point (3, 4) is on the terminal side of angle θ. cos θ = ... - Football league
The 2nd football league plays each of the 16 participants with each opponent twice. Every victory gets 3 points, 1 point for a draw, a defeat, or none. After the competition, the team had 54 points and 12 defeats at 9th place. How many times has the team - Two typists
Two typists are rewriting the material of 814 pages. The first can rewrite yourself for 24 days and the second 12 for days. The first typist wrote material yourself 4 days rest rewrites yourself second typist. How many days will it take to rewrite altoget
Pablo received from his master a cuboid composed of identical sugar cubes, each weighing between 1000 and 2000. The Pejko eat sugar cubes in layers. On the first day, eat one layer from the front. On the second day, one layer is from the right, and on theDo you have unsolved problem that you need help? Ask a question, and we will try to solve it. Solving math problems.
