The 10 Penny Puzzle is a fun and approachable design. The concept is simple, fit all ten US pennies into the square opening.
It was designed based on the branch of recreational maths called ‘circle packing’ where the aim is to fit ‘n’ unit circles into the smallest square possible. This version is not actually particularly difficult and a bit of persistence should see most finding the solution.
10 Penny Puzzle comes in an unsolved state with a free space for the final coin.
The solution is included.