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List of all 4 digit combintions without repeating using only numbers 0-9?
Wiki User
∙ 15y ago
Just do it systematically, START WITH 0123 0124 0125 etc 0129 now 1234 1235 keep going! There are 10 numbers from 0 to 9. So the number of combinations of 4 digits numbers is 30.
10C4 = 10!/[(10 - 4)!4!] = 10!/(6!4!) = (10 x 9 x 8 x 7 x 6!)/(6! x 4 x 3 x 2 x 1)= 10 x 3 = 30
Wiki User
∙ 15y ago
Gl1tching Mxcha
list of all 4 digit codes without repeating using only number 1-9?
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24680
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24
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256
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93876
