



 
Jamboree, It depends on whether a digit can be used more then once. Are 122 and 444 possible combinations? That is, do you mean "combination" in the lock sense, or the mathematical one? In any case, the easiest thing to do is start at 000 then proceed to 001, 002, and so on until, finally, you get to 999. That is, count from 0 to 999 and add zeros on the left so that you always have a three digit number. Victoria  


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