<PRE><B>Question 93418</B>
1) How many phone numbers in Chicago can have the area code 312?
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If 0 and 1 are not used you have 8^7 numbers = 2,097,152
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If 0 and 1 are used you have 10^7 = 10,000,000
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Chicago would probably need the larger number.
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Cheers,
Stan H.</PRE>