Had a discussion today concerning the total number of possible 4 digit combinations using the numbers 0 - 9, as seen on pin codes etc.
I’ve worked it out to be 10,000 possible combinations, but what I can’t understand is how practically every person (in the uk at least) has a unique 4 digit pin code? Surely 10,000 is too little to deal with a whole county!
Anyone clarify this?
That’s true, buts it’s very easy to remember, for the customer. There are other security measures that banks take, other than 4 digits. E.g. if you enter the wrong number the machine will swallow your card.
please give all th possible 4 digit combinations please
The thing is that the PIN is tied to an account. In otherwords, each account has 10,000 possibilities for it’s PIN.
Not everyone has a different pin.
An account number is like 8 digits, a card number is 16.
So there’s 10^8 account numbers and 10^16 different card numbers. Each account has 10^4 possible pin-numbers.
So it’s the account / card number that’s unique for each person, not the pin number.