A simple number theory problem

The media is abuzz with the news of the Abel Prize to Sir Andrew Wiles for his stunning proof of Fermat’s Last Theorem. if you are also passionate about Number Theory, here’s an appetizer for you:

Problem:

How many 7-digit numbers that do not start with nor end with 1 are there?

More later,

Please send your solutions, comments, questions.

Nalin Pithwa

2 thoughts on “A simple number theory problem

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