Maths practice for 14 year olds - page 318 of 321
Number of problems found: 6406
- Electronics: Resistors in parallel
Concerning calculating the resistance of the parallel combination of resistors: (1)/(R) = (1)/(R1) + (1)/(R2) Calculate the R, if R1 = 17Ω a R2 = 20Ω - Triangle angles
The angles α, β, γ in triangle ABC are in the ratio 6:2:6. Calculate the size of angles. - Tractors
Fields go plow two tractors with various performances. The first tractor plows the whole field in 20 hours. The second tractor plows the whole field 4 hours kratšie. How long does it take to plow the whole field with two tractors? - Bits, bytes
Calculate how many different numbers can be encoded in a 16-bit binary word.
- Rectangle Anton
The difference between the length and width of the rectangle is 8. Length is 3-times larger than the width. Calculate the dimensions of the rectangle. - Morse alphabet
Calculate how many words of Morse code to create compiling dashes and dots in the words of one to piatich characters. - Teams
How many ways can we divide 14 players into two teams of 7 members? - Tournament
Determine how many ways can be chosen two representatives from 34 students to school tournament. - Guests
How many ways can 8 guests sit down on 10 seats standing in a row?
- Tangents
To circle with a radius of 41 cm from the point R guided two tangents. The distance of both points of contact is 16 cm. Calculate the distance from point R and circle center. - Elections
In elections, candidates 10 political parties. Calculate how many possible ways the elections can finish if two parties do not get the same number of votes. - Confectionery
The village markets have 5 kinds of sweets. One weighs 31 grams. How many different ways can a customer buy 1.519 kg sweets? - Chords
How many 4-tones chords (chord = at the same time sounding different tones) is possible to play within 7 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 5th football league is 10 teams. How many ways can be filled first, second, and third place? - Floating barrel
The barrel (cylinder shape) floats on water, the top of the barrel is 8 dm above water, and the width of the surfaced barrel part is 23 dm. The barrel length is 24 dm. Calculate the volume of the barrel.
The circle segment has a circumference of 135.26 dm and 2096.58 dm² area. Calculate the radius of the circle and the size of the central angle.Do you have homework that you need help solving? Ask a question, and we will try to solve it. Solving math problems.
