SOLUTION: If each post office has its own five-digit zip code in which the last digit must be a 0, how many offices can there be?

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Question 658665:
If each post office has its own five-digit zip code in which the last digit must be a 0, how many offices can there be?
Found 3 solutions by jim_thompson5910, lynnlo, Alan3354:
Answer by jim_thompson5910(35256) About Me  (Show Source):
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You have 10 digits being assigned to 4 slots (since the last one must be a zero). So you have 10^4 = 10,000 potential offices.

Answer by lynnlo(4176) About Me  (Show Source):
You can put this solution on YOUR website!
0-9 is (10) numbers
zip codes are (5)
50

Answer by Alan3354(69443) About Me  (Show Source):
You can put this solution on YOUR website!
If each post office has its own five-digit zip code in which the last digit must be a 0, how many offices can there be?
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The 1st 4 digits are 0 - 9, 10 choices
--> 10^4 = 10000 offices.