SOLUTION: how many such telephone numbers are there all together

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Question 1145193: how many such telephone numbers are there all together
Found 2 solutions by Alan3354, ikleyn:
Answer by Alan3354(69443) About Me  (Show Source):
You can put this solution on YOUR website!
What are "such telephone numbers" ?

Answer by ikleyn(52778) About Me  (Show Source):
You can put this solution on YOUR website!
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You missed the beginning of the problem formulation, which is, probably, in the other side of the page . . .