Safecracker 50 Wooden Math Brain Teaser | Difficult Puzzle for Adults air force gifts or prevent dementia

or prevent dementia

Want something more approachable

MULTIPLE SOLUTIONS - The 9 puzzle pieces can be arranged 13 different ways

this puzzle provides a realistic challenge for both children and adults

4) Align the wheels such that exactly 4 four-letter words appear at the same time

Safecracker 50 Wooden Math Brain Teaser | Difficult Puzzle for Adults air force gifts or prevent dementiaSafecracker 50 is a handcrafted wooden math brain teaser designed and built by Dave Janelle and the family workshop crew in Hudson, Florida. Five rotating rings (one base ring plus four top rings), laser cut from maple and cherry hardwoods, with deeply laser engraved numbers. The goal is to align the rings so each of 16 vertical columns sums to 50. There are exactly 1,048,576 ways to align the rings (over a million). Only one is correct. Palm sized at