how many different possible 4 digits pins can be found on the 10-digit keypad?
Leave us a comment of example and its solution (i.e. if it is still somewhat unclear...):
Showing 0 comments:
Be the first to comment!
To solve this example are needed these knowledge from mathematics:
Next similar examples:
- Cars plates
How many different licence plates can country have, given that they use 3 letters followed by 3 digits?
- Coin and die
Flip a coin and then roll a six-sided die. How many possible combinations are there?
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?
- Football league
In the 5th football league is 10 teams. How many ways can be filled first, second and third place?
Seven friends agree to send everyone a holiday card. How many postcards were sent?
In how many ways can be divided gold, silver and bronze medal among 21 contestant?
The bicycle pedal gear has 36 teeth, the rear gear wheel has 10 teeth. How many times turns rear wheel, when pedal wheel turns 120x?
9 trees in 5 lines grows in the orchard. How many trees are in the orchard?
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.
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.
- 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.
Average of 7 numbers is 65. What is its sum?
- Obtuse angle
Which obtuse angle is creating clocks at 17:00?
Iron ore contains 57% iron. How much ore is needed to produce 20 tons of iron?
- The square
The square root of 25 times the square root of 81 is what number?
In 7.C clss are 10 girls and 20 boys. Yesterday was missing 20% of girls and 50% boys. What percentage of students missing?
Triangle whose sides are midpoints of sides of triangle ABC has a perimeter 45. How long is perimeter of triangle ABC?