SOLUTION: enter a 7 digit registration code made up of the digit 1,2,3,4,5,6,7 and 9 each number has to be used and no number can be used more than once how many codes are possible

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Question 1133917: enter a 7 digit registration code made up of the digit 1,2,3,4,5,6,7 and 9 each number has to be used and no number can be used more than once how many codes are possible
Answer by greenestamps(13200) About Me  (Show Source):
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None.

There are 8 digits; if the code has to use every one, then the code will be 8 digits.

That is, there are no 7-digit codes that use all 8 of the given digits.