SOLUTION: Local phone numbers consist of seven numerals, the first three of which are common to many users. Today there are a total of six toll-free area codes: 800, 844, 855, 866, 877, a

Question 1165435: Local phone numbers consist of seven numerals, the first three of which are common to many users.
Today there are a total of six toll-free area codes: 800, 844, 855, 866, 877, and 888. Assume that all seven digits for the rest of a number are possible, and determine how many toll-free numbers are there?
Answer by math_helper(2461) (Show Source): You can put this solution on YOUR website!

Each group of 7 digits represents 10000000 (ten million) possible phone numbers ("0000000" through "9999999"). You have six area codes so 6x10000000 = 60000000 numbers are available.
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