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Zip codes, postal codes and 5 digit codes 
20080708 

From Mike: Sorry if you have answered this before but I don't understand the explanations I have seen.
How many possible combinations are in a 5 digit code (like a Zip Code). Is there an equation that can be used for this type of question? Answered by Penny Nom. 





Zip codes 
20071203 

From Natalie: How many 5 digits zip codes are possible if digits can be repeated? Answered by Penny Nom. 


