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How many different telephone numbers can be used on a city that has 6 area codes?.
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How many different telephone numbers can be used on a city that has 6 area codes?.

User Michael Itzoe
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1 Answer

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well it is going to be 10,000,000 (000-0000 to 999-9999) minus any number before 100-0000 that would make 9,000,000 legal numbers.

i would have to guess

User Vikas Singhal
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