"Who knows that?" ... Maybe YOU know the popular algebraic formulas featured on the pieces! The objective of this difficult math-themed packing puzzle is to fit all nine pieces flat into the frame without overlapping. Designed by Siebenstein-Spiele founder Jürgen Reiche and made in laser-cut wood by Siebenstein-Spiele.
Based in Munster, Germany, Siebenstein-Spiele was founded in 1992. Although the company is mainly known for board games, Siebenstein-Spiele also makes many wooden puzzles, several of which have been designed by company founder Jürgen Reiche.
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