Order 21 Perfect Square Puzzle | Mathematical Brain Teaser large wood puzzle Now everyone has contributed 1

Now everyone has contributed 1 number

completing all three rules at once

Pie is delicious

Different hardwoods used to make the pieces

though these woods may vary

Order 21 Perfect Square Puzzle | Mathematical Brain Teaser large wood puzzle Now everyone has contributed 1Discover 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