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Order 21 Perfect Square Puzzle | Mathematical Brain Teaser
Regular price$30.75
Description
Description
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.
Personalize it!
Personalize it!
Add a personalized laser engraving to your puzzle or game.
- Perfect for gifts
- Business marketing opportunity
Payment & Security
Payment methods
Your payment information is processed securely. We do not store credit card details nor have access to your credit card information.
Product Specifications
- Dimensions
- 7.5 × 7.5 × 0.75
- Materials
- Wood
- Difficulty Level
- Hard
- Age Range
- Adults (18+ years), Teens (13-18 years)
- Piece Count
- 21
- What's Included
- Puzzle board (1), Puzzle pieces (21), Wood cover (1), Instructions and solution sheet (1)
- Gift Occasions
- Christmas, Birthday, Holidays
- Personalization Available
- Yes
- Puzzle Type
- Assembly, Dissection
- Category
- Brain Teaser Puzzle
- Availability
- In Stock
Personalize It!
Did you know we can add a custom laser engraving to every puzzle and game? Well, we can. Add a personal touch to your gift with a name or message.
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Frequently Asked Questions
What is the Order 21 Perfect Square Puzzle?
What is the Order 21 Perfect Square Puzzle?
It is a handcrafted geometric dissection puzzle. You arrange 20 wooden squares inside a frame, leaving the opening for the smallest 21st square, which is laser-engraved on the frame.
What is the math behind it?
What is the math behind it?
It is based on a discovery by A. J. W. Duijvestijn in 1978. It represents the only known perfect square dissection of order 21, meaning a large square divided into 21 smaller squares that are all different sizes.
How do you solve it?
How do you solve it?
Fit the 20 loose wooden squares into the frame so they tile the space exactly, with the engraved 21st square completing the pattern.
What size is the finished puzzle?
What size is the finished puzzle?
When solved, the puzzle forms a square with a side length of 112 units, with each piece scaled to fit precisely.
What is it made of?
What is it made of?
It is made from high-quality hardwood with laser-etched precision so each piece fits cleanly.
How many pieces are included?
How many pieces are included?
There are 20 loose wooden squares, plus the 21st square laser-engraved on the frame.
Who will enjoy this puzzle?
Who will enjoy this puzzle?
Math enthusiasts, serious puzzle solvers, and educators or students using it as a hands-on tool for teaching geometry and logic.
Is it good for teaching?
Is it good for teaching?
Yes. It is a hands-on way to explore geometric dissection, spatial reasoning, and problem-solving, which makes it useful in a classroom setting.
Can I personalize the Order 21 Perfect Square Puzzle?
Can I personalize the Order 21 Perfect Square Puzzle?
Yes. The Order 21 Perfect Square Puzzle can be personalized with a custom laser engraving. Add a name, date, or short message when you order. See our laser engraving page for details and examples. For a custom logo or artwork, request a quote for custom work.
Is there a video?
Is there a video?
Yes. The product page includes a short video showing the Order 21 Perfect Square Puzzle.
Is it a good gift?
Is it a good gift?
Yes. It suits puzzle collectors, math teachers, and anyone who enjoys a rewarding geometric challenge.
Where is it made and where does it ship from?
Where is it made and where does it ship from?
It is designed and handcrafted by Creative Crafthouse in Hudson, Florida, and ships from our Florida workshop. Standard orders ship within 1 business day, and personalized orders within 2 business days.
