Pay in 4 interest-free payments of $3.99 Learn more
Ships within 48 hours · Estimated delivery Aug 21 - Aug 26
Solid Wood Craftsmanship
The lid is securely sealed with four magnets
We bought six sets so we can gift each their own when they graduate high school years from now
This ancient mathematical challenge blends logic
Washington Monument Wood Brain Teaser | Very Hard Math Puzzle for Adults USNA Solid Wood CraftsmanshipWe got the idea for this from Jerry Slocum and Jack Botermans "New Book of Puzzles". The puzzle dates from the 1930's and we tried to copy the old design nearly identically as pictured in Jerry's book. The object of the puzzle is to get all 4 sides to add to 555, the height of the Washington Monument! Each of the cubes will rotate on the internal post. A great challenge for the math inclined as it is VERY difficult. It might make a good class project
US$ 20.00
US$ 28.00
US$ 20.00
US$ 20.00
US$ 332.50
US$ 16.00
US$ 36.00
US$ 30.00
US$ 28.00
