Martin Gardner was fascinated by tessellations, as am I. This year I have decided to share a 3D printed model of a fun math tile that we have been using in our Math Carnivals in the Republic of Panama, organized by the Panamanian Foundation for the…
The gift contains a Thermometer Sudoku and a Thermometer Killer Sudoku with G4G15 2024 theme. Together with the sudokus, there are links that allow you to solve online. Additionally, you can find replay links that show the intended logical solving…
The French name for the Fifteen Puzzle is "Jeu de Taquin". The generalization by Schützenberger to Young tableaux has many amazing properties, and important applications in combinatorics, representation theory and algebraic geometry.
For it's decade of existence the Circo Matemático (mathematical circus), a autonome group of popularisers of mathematics part of the Ludus Association, designed a deck of cards.
The poker-sized cards (63x88 mm) are COPAG 310 quality, slimline, with…
This physical exchange puzzle includes a hexagonal frame, along with three triangles and three squares that are to be fit inside the frame. NOTE: this puzzle was intended for exchange in 2020, but is included now because I was unable to attend until…
Easy and inexpensive geometric frames (of truncated cubes or dodecahedra, for example) can be constructed from coffee stirrers and twist ties. These can be used to hang from the ceiling or to dip in soapy water. When one such frame, tetrahedral in…
Inspired by the fact that coloring Pascal's Triangle based on the parity of the entry results in a Sierpiński triangle-like fractal, each Parity Triangle Card illustrates a distinct two-dimensional sequence in the OEIS and is drawn using a pen…