Maths practice for 14 year olds - page 379 of 382

Number of problems found: 7627

Morse alphabet
Calculate how many words of Morse code to create compiling dashes and dots in the words of one to piatich characters.
Examination
The class is 25 students. How many ways can we choose 5 students for examination?
Teams
How many ways can we divide 14 players into two teams of 7 members?
Tournament
Determine how many ways can be chosen štyria representatives from 32 students to school tournament.
Guests
How many ways can 8 guests sit down on 10 seats standing in a row?
Tangents
From point R, two tangents are drawn to a circle with a radius of 41 cm. The distance between the two points of tangency is 16 cm. Calculate the distance from point R to the centre of the circle.
Discounts on rail (ZSSK)
The railway company ZSSK offers a discount of 40% (SENIOR RAILPLUS) for 9.9 Eur/year. Calculate the real discount rate as a percentage, where passengers will travel 5 Eur per week.
Elections
In elections, candidates 8 political parties. Calculate how many possible ways the elections can finish if two parties do not get the same number of votes.
Chords
How many 5-tónových chords (chord = at the same time sounding different tones) is possible to play within 10 tones?
Sphere A2V
The surface of the sphere is 241 mm². What is its volume?
Sphere fall
How much percent fall volume of a sphere if the diameter decreases 3×?
Sphere growth
How many times does a volume of the sphere rise if priemer rises 10×?
2nd class variations
From how many elements can you create 5112 variations of the second class?
Football league
In the 5. football league is 10 teams. How many ways can be filled first, second, and third place?
Floating barrel
A barrel (cylindrical in shape) floats on water with its top 18 dm above the water surface. The width of the part of the barrel above the waterline is 34 dm. The length of the barrel is 12 dm. Calculate the volume of the barrel.
Circle arc
A circular sector has an arc length of 9.08 km and an area of 58.99 km². Calculate the radius of the circle and the size of the central angle.
3y inflation
The price of the cookie rise in the first year by 2%, the second year fell by 6%, and in the third year increased by 17%. Calculate the average annual increase in the price of the cookie.
Inflation
Once upon a time, a ruler had a printing press and printed money endlessly. As a result, prices rose by 2.7% in the first year, 2.1% in the second, 3.6% in the third, and 5.4% in the fourth. The ruler then lost an election. Calculate the average annual in
Circles
Three circles with radii 30 cm, 28 cm, and 37 cm are mutually tangent externally. What is the perimeter of the triangle whose vertices are the centres of the circles?
Triangle ABC
Right triangle ABC with right angle at the C, |BC|=19, |AB|=26. Calculate the height of the triangle h_AB to the side AB.

Do you have unsolved math question and you need help? Ask a question, and we will try to solve it. We solve math question.