SOLUTION: if the first three digits of someones phone number (do not include area code) are 555, how many different phone numbers could they have?

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Question 208092: if the first three digits of someones phone number (do not include area code) are 555, how many different phone numbers could they have?
Answer by Alan3354(69443) About Me  (Show Source):
You can put this solution on YOUR website!
if the first three digits of someones phone number (do not include area code) are 555, how many different phone numbers could they have?
Assuming there are 4 other numbers (that's not true everywhere), there are 10,000 possibilities.
Each digit is 1 of 10.
10^4 = 10,000