Maths practice for 14 year olds - page 239 of 362
Number of problems found: 7230
- Class composition
A fifth-grade class has 25 pupils. 18% are boys and 23% are girls... [Note: problem appears inconsistent as 18% + 23% ≠ 100%; please check original data.] How many boys are in the class and how many girls? - Rhombus
The rhombus has diagonal lengths of 4.2 cm and 3.4 cm. Calculate the length of the sides of the rhombus and its height. - Young mathematician
A young mathematician was bored. He found that the average age of people in the room where the seminar is held is equal to its count. Then, his 29-year-old brother entered the room. Even then, the average age of all present was the same as the count of pe - Merchant
The merchant lowered cost by 10% in December when it was not sold. Again, in January, it lowered costs by 20% and now costs 576 €. A. How much did the goods stand originally? B. How much do the goods cost after the first lowering? C. How much percent of t - Paul earned
Paul earned 300 CZK in one hour, Wesley 1/3 more than Paul. Wesley worked 60 hours, which is 1/3 fewer hours than Paul worked. How much percent less did Paul an hour than Wesley? How many hours did Paul more than Wesley? How much did Paul earn more than W - Chord distance
Determine the distance of two parallel chords of lengths of 7 cm and 11 cm in a circle with a radius of 7 cm. - Square division
The area of 90000 m² is divided into 36 identical squares. Find the length of the side of one square (in meters). - Ratio of sides
The triangle has a circumference of 21 cm, and the length of its sides is in a ratio of 6:5:3. Find the length of the longest side of the triangle in cm. - Rectangular Garden Area
Calculate the area of Mr. Vejvoda's rectangular garden rounded to whole hectares if you know that garden fencing, including gates and doors, is 420 m long and its dimensions are in the ratio of 9:5 - Overload
What overload in g (g-force) would have passed the pilot if he accelerated from 0 to 600 km/h in 3 seconds? - A triangle
A triangle has one angle of 63.1°, and the other two are in the ratio of 2:5. What are the measurements of the two angles? - Parallelogram Side Heights
The parallelogram is given by: a, b is adjacent sides, va, vb - the respective heights to the individual sides. Calculate its side a, if b = 6 cm, va = 3 cm, vb = 4 cm - Cylinder water
The cylinder has a base diameter of 0.8 m. The area of the base is equal to the area of the casing. How much water can be poured into the cylinder? - Cylinder Bottom Diameter
There are 62.8 liters of water in the cylinder. The water level is 0.5 meters. Determine the bottom diameter. - House Insulation Cost
The Drapers inherited a cube-shaped house from their grandmother, which occupied 121 m² of land. They want to insulate the perimeter walls. How many euros will they pay for the material if 1 m² of material costs 11 euros and 15% of the facade area consist - Line Intersection Equations
Determine the intersection of the two lines p and q if. : p: 3y + 2x-5 = 0 q: 4x + 7y-11 = 0 - Water mixing
How many liters of hot water at 80 °C do we have to mix with water at 10 °C to get 10 liters of warm water at 45 °C? - Canapés on plates
On the table there were 18 plates. On each plate there was the same number of canapés. Tomáš with his friends took away a third of all the plates with canapés. Lenka for her friends took from each of the remaining plates 3 canapés. On the table there thus - Sidewalk
Workers will pave a 1-meter-wide sidewalk in the garden with tiles around the block-shaped pool. In the picture, the sidewalk is shown in gray. The dimensions of the bottom of the pool are 8.5 meters and 6 meters. The height of the pool walls is 2 meters. - Find radius
Find the radius of the circle using the Pythagorean theorem where a=9, b=r, c= 6+r
Do you have unsolved math question and you need help? Ask a question, and we will try to solve it. We solve math question.
