IBM Research | Ponder This | July 2016 solutions
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July 2016

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A high school student (Arthur Befumo) and an IBMer (Jonathan Lenchner) wrote a paper "Extensions of Golomb's Tromino Theorem" ( that solves this month's problem.
Many of you solved with P and Y or P and L. See Jesse Rearick's drawing here on how to solve it with P and L pentominos.