Ratio - practice for 13 year olds - last page
Number of problems found: 799
- Rectangle - sides ratio
Calculate the area of a rectangle whose sides are in ratio 9:14 and perimeter is 388. - 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 11 hours. The second tractor plows the whole field 19 hours longer. How long does it take to plow the whole field with two tractors? - Circumference - a simple
What is the ratio of the circumference of any circle and its diameter? Write the result as a real number rounded to 2 decimal places.
- Discounts on rail (ZSSK)
The railway company ZSSK offers a discount of 15% (REGIONAL) for 5 Eur/year. Calculate the real discount rate as a percentage, where passengers will travel 19 Eur per week. - Density - simple example
Material of density of 1189 kg/m³ occupies a container volume of 64 cm³. What is its mass? - Cone in cylinder
The cylinder is an inscribed cone. Find the ratio of the volume of the cone and cylinder. Please write the ratio as a decimal number and as a percentage. - Cone in cube
The cube is an inscribed cone. Determine the ratio of the volume of cone and cube. Please write the ratio as a decimal number and as a percentage. - Lunch for free
Gastro tickets are "free," so it should retain them. Goods for free approve by many employees in Slovakia. Such as a free gastro ticket per day work. The company issuing gastro tickets gets a 4.9% fee of the total amount of money for tickets. Calculate ho
- Number ratio
Calculate two positive numbers. Its ratio is 6:6, and difference was 0. - Angles in triangle
The triangle is the ratio of the angles β:γ = 6:8. Angle α is 40° greater than β. What is the size of the angles of the triangle? - Percentages and numbers
How many percent is number 69 smaller than number 276? - Two numbers
Find two numbers whose difference and the ratio are $n. - Acid
The barrel is 199 liters of 38% acid. How many percent of acids occur when 61 liters revoke and replaced with the same amount of water?
- Election mathematics
In elections, 12 political parties received this shares of voters: party A 56.2 %party B 8.5 %party C 8.2 %party D 6.2 %party E 6.1 %party F 5.5 %party G 3.2 %party H 2.1 %party I 2 %party J 1 %party K 1 % Calculate what the shares acquired in the parliam - Temperature calculus
Calculate the percentage of temperature increase if changed from 18°C to 33°C. - Engineer Kažimír
The TV show example beautifully illustrates the difference between politicians-demagogues and reasonable people with at least primary education. Engineer Kažimír says that during their tenure, there was a large decline in the price of natural gas. The pri - Profitable bank deposit 2012
Calculate the value of what money lost creditor with a deposit € 5200 for 5 years if the entire duration is interesting 3% p.a. and tax on interest is 19%. Annual inflation is 4.4% (Calculate what you will lose if you leave money lying idle at negative in - Greek railwayman
Lewis works for the Slovak railways since 2000. His salary is 950 €. His colleague, Evgenias works in the Greek State Railways from 1984. Evgenias earns 5700 € per month. Calculate: a) how many times does Evgenias earn more than Lewis? b) how many times d
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