Washington Monument Wood Brain Teaser | Very Hard Math Puzzle for Adults waldorf toy toys The 45 game uses basic

The 45 game uses basic addition skills and the Factors game uses basic multiplication and division skills and reinforces the concepts of factors and multiples

Write down that number below the first number (as we will be adding all the numbers)

offering both aesthetic appeal and mental stimulation

but this in itself can be a goal

Difficulty: a real hands-on puzzle

Washington Monument Wood Brain Teaser | Very Hard Math Puzzle for Adults waldorf toy toys The 45 game uses basicWe 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