Creative Crafthouse

Order 21 Perfect Square Puzzle | Mathematical Brain Teaser

Order 21 Perfect Square Puzzle | Mathematical Brain Teaser - Main image
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$21.22 $30.75 In stock

Discover 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 important mathematical achievement. It provides an engaging way to explore geometry, logic, and spatial reasoning.

Premium Handcrafted Design

  • Made from high-quality hardwood for durability and a beautiful finish.
  • Laser-etched precision ensures each piece fits perfectly.
  • Frame size: The completed puzzle forms a square with a side length of 112 units.

Who Will Love This Puzzle?

  • Math Enthusiasts: A must-have for those fascinated by geometric dissections.
  • Puzzle Lovers: A unique and rewarding challenge for serious solvers.
  • Educators & Students: A hands-on tool for teaching math and logic in an interactive way.

Why Choose This Puzzle?

  • Educational Value: Encourages critical thinking and problem-solving skills.
  • Historical Significance: Based on the only known perfect square dissection of order 21.
  • Great Gift Idea: Ideal for puzzle collectors, math teachers, and anyone who loves a challenge.

Made in the USA

Designed and handcrafted by Creative Crafthouse in Hudson, FL.

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Customer Reviews (5.0 / 5 · 2 reviews)

Natalie B. ★★★★★

I wasn't expecting much, but actually solving the geometric dissection based on Duijvestijn's 1978 discovery is a real thrill if you're into math puzzles. The pieces fit together in a way that makes you rethink spatial logic, and the satisfaction of finally completing the square is worth the struggl

Sebastian W. ★★★★★

This puzzle is a fantastic way to appreciate a real 1978 mathematical discovery. The perfect square dissection is incredibly satisfying to assemble, and the precision of the laser-cut pieces makes each fit feel intentional.