Think Thursday 10-19-17: Chessboard and Dominoes

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Problem of the Week 10-17-17: Positive Integer Triple

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Think Thursday 10-12-17: Rays through Squares

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Problem of the Week 10-10-17: Marking the Grid [Configurations]

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Think Thursday 10-5-17: Cheryl's Birthday [Deductive Reasoning]

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Problem of the Week 10-3-17: Folding a Piece of Paper [Geometry]

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