4!-Fold Puzzle
Puzzle
Are there any polycubes that can be unfolded into exactly a rectangle? This problem was solved in 2019. The smallest solution forms a nice puzzle — fold the rectangle into a polycube!
G4G14
Bob Hearn
G14-061
Public Math Postcards
Recreational Math
Postcard from Public Math with thought provoking questions.
G4G14
Molly Daley
G14-062
Sakura Pythagorean Tree
Art
Inspired by the Pythagorean Tree in a plane, I stitched the Sakura Pythagorean Tree on a temari ball of diameter 58 cm. This Pythagorean tree has order five and begins with a square of side 5 cm. Upon the first square I constructed two squares to depict the Pythagorean theorem, and from there I continued recursively. Each square is scaled down by a linear factor of about 0.7.
G4G14
Marcela Chioresw
G14-064
Jerry Slocum Mechanical Puzzle Collection Trihexaflexagon
Puzzle
Toy
The item I would like to submit for the G4G14 Gift exchange is a copy of a give-away puzzle, developed by the IU Libraries, to advertise the Jerry Slocum Mechanical Puzzle Collection. This promotional item features a trihexaflexagon and informational sheet. On one side of the informational sheet is a short history of the flexagon, Martin Gardner and the Jerry Slocum Mechanical Puzzle Collection. The other side includes directions for making the trihexaflexagon. When the trihexaflexagon is formed, the three faces include additional information on the Slocum Mechanical Puzzle Collection.
G4G14
Andrew Rhoda
G14-065
Quadratic Formula Nomograph
Recreational Math
This is a cute graphical computing device which finds the roots of a quadratic polynomial. Stretch the (included) string between two scales representing the coefficients of the polynomial, and it tells you the roots! This device is based on an original 1915 design by E.T. Whittaker.
ET Whittaker
G4G14
Chris Staecker
G14-067
The Decaflop Rolling Block Puzzle
Puzzle
This is a rolling block puzzle. Roll the block from the start location to the end location. Avoid the obstacles in your path, and don't roll the block over its beveled edge. It will take some decaflops to get to the finish!
James W. Stephens
G14-003