Geometric Puzzles and Competition

Challenge yourself to solve a number of two and three-dimensional geometric puzzles. They include the Slothouber-Grattsma Puzzle (which is easier than it is pronounced), the Hexiamonds, MacMahon's Three-Color Squares, the Polyhexes, and the Eurika! Puzzle. Additionally, there is a contest for which the fastest to solve the puzzle for the day will win a geometric pencil sculpture.

Use all 24 pieces to form a 4 x 6 rectangle where the boundary are all the same color and internal edges that meet have the same color

First prize for winning the contest