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Ships within 48 hours · Estimated delivery Aug 25 - Aug 30
Pay in 4 interest-free payments of $7.69 Learn more
Ships within 48 hours · Estimated delivery Aug 25 - Aug 30
©2016 Creative Crafthouse ® Made in Hudson
Families & Game Night Lovers: A fun and interactive activity for all ages
and casual gatherings
Strategy: Plan each move carefully to avoid being left with multiple pegs
Order 21 Perfect Square Puzzle | Mathematical Brain Teaser moms ©2016 Creative Crafthouse ® MadeDiscover the beauty of geometric dissections with the Order 21 Perfect Square Puzzle. Based on a groundbreaking mathematical discovery by A. J. W. Duijvestijn in 1978, this unique puzzle challenges you to arrange 20 wooden squares inside a frame, leaving an opening for the smallest 21st square, which is laser engraved on the frame. A Historic Mathematical Challenge This puzzle represents the only known perfect square dissection of order 21, an