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Computers and Technology, 07.10.2019 03:30 dm0321545
The international telecommunications union (itu) specifies that a telephone number must consist of a coun- try code with between 1 and 3 digits, except that the code 0 is not available for use as a country code, followed by a number with at most 15 digits. how many available possible telephone numbers are there that satisfy these restrictions?
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