Mock AIME 5 2005-2006 Problems/Problem 11
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[hide]Problem
Let be a subset of consecutive elements of where is a positive integer. Define , where if has an odd number of divisors and if has an even number of divisors. For how many does there exist an such that and ? ( denotes the cardinality of the set , or the number of elements in )
Solution
Solution
See also
Mock AIME 5 2005-2006 (Problems, Source) | ||
Preceded by Problem 10 |
Followed by Problem 12 | |
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