The answer to this is 9,999. Easy cuz 9999 is the last 4 digit number. (What ru trying to open a suitcase cuz u forgot the password lol (or ru a thief rofl).
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There are 210 4 digit combinations and 5040 different 4 digit codes.
Any 4 from 10 in any order = 10 x 9 x 8 x 7 = 5040
There are 256. Some of them are: 1111, 1112, 1113, 1114, 1121, ... 2111, 2112, 2113, ... 3111, 3112, ... 4111, etc.
what is the least possible sum of two 4-digit numbers?what is the least possible sum of two 4-digit numbers?
i would like a list all possible 4 digit combination using 0-9