Percentages - practice for 12 year olds - page 15 of 16
Number of problems found: 304
- Rectangles
How many rectangles with area 3152 cm² whose sides are natural numbers? - Guess number
With what number should be divided, number 9727 to be reduced by 70%? - Equilateral triangle
Calculate the side of an equilateral triangle if its area is 886 mm². - Iron
Iron ore contains 54% iron. How much iron ore is needed to produce 23 tons of iron?
- Barrel of oil
The barrel of oil weighs 283 kg. When it molded 26% oil, it weighed 216 kg. What is the mass of the empty barrel? - Extreme temperatures
The USA hit an extreme heat wave. Calculate the percentage of the air temperature change from normal summer temperature $t2 °C to $t1 °C. - Magnification of the square
If we increase the square side, increase the area of the 70 %. About what percentage was increased on its side? - Slovakia banks
It is an unwritten rule that the larger bank in Slovakia (number of clients, balance sheet) has the worst / more expensive services offered to clients. Perhaps customs and herd customers prefer only the trio SLSP, VUB, and Tatrabanka. Calculate how many t - Human buying irrationality
I longer watch processors for Socket A on the secondhand market, Athlon XP 1.86GHz with a PR rating of 2500+ costs $7, and Athlon XP 2.16Ghz with a PR rating of 3000+ currently costs $16. Calculate: About what percentage of the Athlon XP 2.16Ghz is more p
- Barrel with liquid
Barrel with grain weight 297 kg. When it sheds 48% of grain, ha weight 174 kg, what is the weight of an empty barrel? - Window
Peter demolish a box hole in the wall for the window frame 147×51 cm. When they come, they will find a master-fitted frame and window that glass is 13.3 cm from the hole in each direction. Calculate how much percent less light enters the window than - VAT
VAT is a tax on which the state artificially betrays goods and services for final consumption. VAT in Slovakia is 20%. Calculate how much percent pay fewer tax residents of Japonska, when VAT is only 5%. - Solidarity
Imagine a word solidarity means that salt donation to the needy, who have neither the salt. If we take the word solidarity has a word base on salt + gift (only in the Slovakian language). Calculate how many kilos of salt a sympathetic citizen "gives" gove - Insurance
The house owner is insured against natural disasters and pays 0.05% annually of the value of the house 145 Eur. Calculate the value of the house. Calculate the probability of disaster if you know that 45% of the insurance is to pay damages.
- 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 - Farmer
The farmer is farming 293 ha of arable land, and the remaining 20% are meadows and pastures. How much land does the farmer own? - Cube wall
The surface of the first cube wall is 64 m². The second cube area is 40% of the surface of the first cube. Find the length of the edge of the second cube (x). - Percent calculation
Calculate 8% if 44% is 32. - Car inflation
What percentage of car price increases if the price rises from €1880 to €2200?
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