Difference between revisions of "Mock AIME 4 2006-2007 Problems/Problem 1"
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Revision as of 11:45, 16 January 2007
Problem
Albert starts to make a list, in increasing order, of the positive integers that have a first digit of 1. He writes 
but by the 1,000th digit he (finally) realizes that the list would contain an infinite number of elements. Find the three-digit number formed by the last three digits he wrote (the 998th, 999th, and 1000th digits, in that order).
Solution
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