About This

• MECHANICAL MATH PUZZLE: This diabolical math brainteaser requires you to spin each of the layered gears until every column that radiates out from the center point adds up to 42 simultaneously.
• ULTIMATE CHALLENGE: Rated five out of five stars for difficulty, this wooden puzzle requires visualization and problem-solving skills to complete. Work on it all at once or come back to it over and over again to solve.
• SMART GIFTS FOR SMART PEOPLE: This laser-cut wood brainteaser is perfect for display on a bookshelf or desk. An ideal gift for Engineers, Computer Scientists, and anyone seeking a tough but fun mental challenge!
• INSPIRED BY HISTORY: All True Genius brainteasers draw inspiration from ancient civilizations and include the backstory of their design. These quality metal and wood puzzles make great gifts and are perfect for display on a bookshelf or desk.
• CREATED BY PROJECT GENIUS: A leading U.S. manufacturer of mechanical puzzles and strategy games for over 10 years. We are a woman-owned business, proud to offer a dedicated work program for young adults with autism.