# High school + multiplication - examples

1. Lathe
95% of the components manufactured on the lathe comply with the standard, of which 80% of the components are first-class. How likely can we expect a manufactured part to be first class?
2. Percent change
If the length of a rectangle is increased by 25% and the width is decreased by 10%, the area of the rectangle is larger than the area of the original rectangle by what percent?
3. Bonus
Gross wage was 527 EUR including 16% bonus. How many EUR were bonuses?
4. Logic
A man can drink a barrel of water for 26 days, woman for 48 days. How many days will a barrel last between them?
5. Server
Calculate how many average minutes a year is the web server is unavailable, the availability is 99.99%.
6. No. of divisors
How many different divisors has number ??
7. Observer
The observer sees straight fence 100 m long in 30° view angle. From one end of the fence is 153 m. How far is it from the another end of the fence?
8. 7 heroes
9 heroes galloping on 9 horses behind. How many ways can sort them behind?
9. Flags
How many different flags can be made from colors white, red, green, purple, orange, yellow, blue so that each flag consisted of three different colors?
10. Vans
In how many ways can 9 shuttle vans line up at the airport?
11. Numbers
Determine the number of all positive integers less than 4183444 if each is divisible by 29, 7, 17. What is its sum?
12. Seating
How many ways can 7 people sit on 3 numbered chairs (eg seat reservation on the train)?
On the meadow grazing horses, cows and sheep, together less than 200. If cows were 45 times more, horses 60 times more and sheep 35 times more than there are now, their numbers would equall. How many horses, cows and sheep are on the meadow together?
14. Daily average
Calculate the average temperature during the day, when 13 hours was 22 °C and 11 hours was 17 °C.
15. Sand pile
Auto sprinkled with sand to approximately conical shape. Workers wanted to determine the volume (amount of sand) and therefore measure the circumference of the base and the length of both sides of the cone (over the top). What is the volume of the sand c
16. Guests
How many ways can 5 guests sit down on 6 seats standing in a row?
17. The cyclist
The cyclist went from village to town. First half of journey went at 20 km/h. The second half of the journey, which mostly fell, went at 39 km/h. All journey took 88 minutes. Calculate the distance from the village to the town.
18. Inflation
Once upon a time, tsar owned a money printer and printed and printed. The result of printing money prices went up,in the first year 3.9 %, in the second 6%, in the third 4.7% and in the fourth 5.5%. Then tsar was failed in election. Calculate the aver
19. Negative percentage
In 2004, the company had a loss of 40900 Euros. Two years later he was already in profit 48900 Eur. Calculate what percentage of the company increased profits in this two years.
20. Rates
When gas consumption, the consumer may choose one of two rates: rate A - which pays 0.4 € per 1 m3 of gas a flat monthly fee of 3.9 € (regardless of consumption) rate B - which pays 0.359 € per 1 m3 of gas a flat monthly fee of 12.5 € From what monthl

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