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Two Squares
Problem
Given that $n$ is a positive integer and $2n+1$ and $3n+1$ are perfect squares, prove that $n$ is divisible by 40.
Problem ID: 338 (16 May 2008) Difficulty: 3 Star
Given that $n$ is a positive integer and $2n+1$ and $3n+1$ are perfect squares, prove that $n$ is divisible by 40.
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