# Pins 2

how many different possible 4 digits pins can be found on the 10-digit keypad?

Result

x =  10000

#### Solution:

Leave us a comment of example and its solution (i.e. if it is still somewhat unclear...):

Be the first to comment!

#### To solve this example are needed these knowledge from mathematics:

See also our variations calculator. Would you like to compute count of combinations?

## Next similar examples:

1. Cars plates
How many different licence plates can country have, given that they use 3 letters followed by 3 digits?
2. Coin and die
Flip a coin and then roll a six-sided die. How many possible combinations are there?
3. Football league
In the 5th football league is 10 teams. How many ways can be filled first, second and third place?
4. Seven
Seven friends agree to send everyone a holiday card. How many postcards were sent?
5. Peak
Uphill leads 2 paths and 1 lift. a) How many options back and forth are there? b) How many options to get there and back by not same path are there? c) How many options back and forth are there that we go at least once a lift?
6. Morse alphabet
Calculate how many words of Morse code to create compiling commas and dots in the words of one to four characters.
7. Medals
In how many ways can be divided gold, silver and bronze medal among 21 contestant?
8. Coal mine
The monthly plan of 17,000 tons of coal exceeded the mine by 1/25. How many tonnes of coal have been harvested from the mine above plan?
9. Five-digit
Find all five-digit numbers that can be created from numbers 12345 so that the numbers are not repeated and then numbers with repeated digits. Give the calculation.
10. Variations
Determine the number of items when the count of variations of fourth class without repeating is 42 times larger than the count of variations of third class without repetition.
11. Watching TV
One evening 2/3 students watch TV. Of those students, 3/8 watched a reality show. Of the students that watched the show, 1/4 of them recorded it. What fraction of the students watched and recorded reality tv.
12. Average
Average of 7 numbers is 65. What is its sum?
13. Iron
Iron ore contains 57% iron. How much ore is needed to produce 20 tons of iron?
14. Obtuse angle
Which obtuse angle is creating clocks at 17:00?
15. Percentages
Expressed as a percentage:
16. Average
The arithmetic mean of the two numbers is 71.7. One number is 5. Calculate the second number.
17. Multiples
Find all multiples of 10 that are larger than 136 and smaller than 214.