Browse Items (98 total)
- Collection: G4G13 Exchange Bag
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Exploding Kittens - First Edition Game
Exploding Kittens is a highly-strategic, kitty-powered version of Russian Roulette. Players draw cards until someone draws an Exploding Kitten, at which point they explode, they are dead, and they are out of the game. UNLESS that player has a Defuse…
G4G13 Clock Face
A clock face showing the logo for G4Gn at the nth hour, for n=5-12, and the G4G13 logo in the center, and miscellaneous MG items for hours1-4.
G4G13 Latin Square Puzzles
A small collection of Latin square themed puzzles created in honor of the G4G13 conference.
G4G13 Logo Design
This configuration of thirteen sets of concentric circles grows out of an ancient tradition of visual alchemy. The faculties of imagination and intuition are employed as guides in the discovery of new and meaningful relationships between geometric…
G4G13 Puzzle Cube
Three linked square bands with the G4G13 logo printed on some faces. Arrange the bands to form a cube with a logo on all 6 faces.
Geometry in Five-Dimensions: Building Quasicrystals from Penrose Tiling
No-one really knows what quasicrystals look like. But we do know, from the diffraction patterns of X-ray crystallography, that they bear a resemblance to Penrose tiling. By combining artistic exploration with mathematical insight into the…
Global Maps - Past and Future
Two Lenticular cards from Germany - one shows Pangea the last supercontinent 300 million years ago, and the second card shows the map of the globe in the next Heat Age when all the ice melts. This may result in a net gain in land!
Golden Magic
My artwork, 'Golden Magic', especially created for G4G13 conference is dedicated to four remarkable men: Martin Gardner, Raymond M. Smullyan, Tom Rogers, and Al Seckel. Rich in golden mean proportions the composition consists of 13 elements placed…
Horocycle Kit
A scissors and tape activity on a letter sized sheet of cardstock, for building a horocyclic model of the hyperbolic plane, with a postcard-sized memento of of our sculpture build attached.
How Safe Is It?
A spectator, with good arithmetical abilities, opens an invisible safe and deposits some invisible coins in it. The magician has the spectator do some arithmetic, receives the final result and then correctly opens the safe and retrieves the correct…
Kencils
“Kencils”, jumbo pencils with sample puzzle sheet
Knight Mazes
Knight mazes are a set of squares on a square lattice upon which a chess knight may move. We examine elements of mazes which can be both attractive and puzzling, and discuss two methods of creating mazes.
Knotted Bracelet
A hand-made rubber bracelet in the form of a trefoil knot. It is a mathematical curiosity, a puzzle, an impossible object, and a piece of nerdy jewelry.
Laser Cut Pythagorean Theorem Puzzle
A laser-cut puzzle that illustrates a proof of Pythagoras’ theorem. The puzzle pieces either fit in 2 squares aXa and bXb, or in a hypotenuse square cXc. The shapes in the puzzle are taken from a known proof of Pythagoras’ theorem. To my surprise the…
Latice Maze Puzzle
It’s a lattice-maze puzzle invented by Frank Worrell that I’m calling DoubleCrossed Squares. (Its old name was Lattice 2).
Lights & Spheres
A 7cm green plastic sphere with a surface of conical projections, otherwise known as a Cando Massage Ball.
Titanium LED keychain flashlights: I will ship 200 with white LED, 100 with red, blue and green LEDs. Each attendee will receive one light…
Titanium LED keychain flashlights: I will ship 200 with white LED, 100 with red, blue and green LEDs. Each attendee will receive one light…
Linked Circles, Space Numbers and Space Logic
A single two sided heavy page detailing some research on linked circles, space numbers and space logic as a physical gift. In addition a downloaded paper on the same subjects with more details.
Loyd Polyominoes Puzzle
A puzzle of eight acrylic shapes which can be put together to form any one of the twelve pentominoes or the five tetrominoes. The discovery of this eight piece set is described in the paper "Development of the Loyd Polyominoes Puzzle" in the G4G13…
Lucky 13
13 beautiful puzzles of 13 different tiles each with 13 amazing solutions, all designed by Michael Dowle, and an introduction to the "Cookie Jar" puzzle Kadon Enterprises, Inc., is publishing of one of the 13 styles, having its world premiere at…
Marjorie Rice's "Versatile"
Two pages
(1) a description of how to construct Marjorie Rice's "versatile" together with six patches of copies of the tile that will fill the plane by translations.
(2) a sheet with 20 copies of the versatile to copy and cut out in order to…
(1) a description of how to construct Marjorie Rice's "versatile" together with six patches of copies of the tile that will fill the plane by translations.
(2) a sheet with 20 copies of the versatile to copy and cut out in order to…
Markus Götz Memorial Folding Puzzle
Folding puzzle designed by Markus Götz.
Martin Gardner Portrait Maze
Illustration and maze design by Elizabeth Carpenter.
Mechanical Gift
I have gifted an assortment of laser cut acrylic kits of simple mechanisms, including locks, engines, and other such mechanical devices. These were originally designed as physical diagrams for a book project, but are now being produced for sale.…
Mental Factoring Cheat Sheet
This is a summary of mental factoring, the essential information condensed into two pages.