Browse Items (98 total)
- Collection: G4G13 Exchange Bag
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Money From Nothing: Or Why the Serial Number Now Appears Twice on Each Piece of Currency
Martin Gardner introduced me to Vanishing Area Paradox Puzzles in Aha! Gotcha! with the Vanishing Leprechaun Puzzle. He explained the paradox by describing an old counterfeiting method. I've learned the method and so I'm going to share it with you.…
Motley Cube
Six identical sheets to cut out and assemble to make a colorful transparent model of a Motley Cube - a cube dissected into the minimum number of rectangular blocks such that no two blocks are both bounded by the same two parallel planes. In other…
Multimodular Origami: A Truncated Icosahedron
This document contains original diagrams and instructions for making a truncated icosahedron (Buckyball) using hexagon and hexagon/pentagon strip modules designed by the author.
Nontransitive Dice for Three Players
With nontransitive dice you can always pick a dice with a better chance of winning than your opponent. There are well known sets of three or sets of four nontransitive dice. Here we explore designing a set of nontransitive dice that allows the player…
Pattern Stacker
An abstract spatial thinking pattern puzzle
Pentomino Divination Runes
A small bag containing twelve square tiles, each with a different pentomino marked on it. Instructions for use in divination are included, along with a set of puzzles using the runes.
PiTop
Pi is certainly one of the most important numbers in mathematics, physics, engineering and, indeed, in all scientific and even some artistic subjects. I have developed a new object which makes Pi tangible in novel tactile, acoustic and visual ways.…
Poly-Twostors Periodic Table, Catalog of 3D Printer Models
It is a classification of 3D Tori. This catalog consists of 14 page which lists the Poly-Twistor models updated in January 2018.
Postcard and Tiny Piece of Equilateral Tridecagon Tiling
I prepared postcards and tiny pieces of "Equilateral Tridecagon Tiling" for the Gift Exchange.
Puzzle Ninja Puzzles
The gift is a postcard with a few examples of a Japanese pencil-and-paper logic grid puzzle on it.
Puzzle Stickers
My contribution to the gift exchange is stickers hiding clues leading to a mathematical treasure hunt I'm hosting across my blog and a few other spots on the internet. I also have a physical prize for the first person to reach the end.
Quandong Seeds Puzzle
A simple puzzle made using Quandong (desert peach) seeds. Quandongs can be found throughout the arid areas of Central Australia and are an important food source for people and native fauna such as emu.
Rainy Day Puzzle Postcards (with the Temporal Logic system called D)
Years ago, when I first learned of the Temporal Logic system called D, I made a puzzle postcard using the system and mailed copies to a few friends. They seemed to enjoy it, so I'm doing it again, for the Gift Exchange.
Reversing Nesting Box Puzzle
The puzzle consists of two boxes, with lids, One box is white and the other is blue. Place the white box inside of the blue box and close the lid. Now open the blue box and remove the white box. Next place the blue box inside of the white box and…
Rubik's Crew - Pinkie Pie
My Little Pony, 2x2, Rubiks Cube
Sam Loyd Puzzles You Have Not Seen
In 1909, the Lyon Manufacturing Co. of Brooklyn, NY, published a small advertising booklet for Mexican Mustang Liniment. The booklet contained sixteen Sam Loyd puzzles, most signed with Loyd’s name. Most of the puzzles were duplicates or redrawn…
Sculptural Martin Gardner
My contribution to the gift exchange is a 5 X 7 inch, four-color, tri-fold glossy card with photographed imagery of my 11 X 12 X 9 inch multifaceted-portrait-sculpture of Martin Gardner. My painted, kiln-fired, stained glass and…
Space Chips
Space Chips are a versatile building toy. With the same chips you can build 3D shapes that are symmetrical, or you can build 3D characters that are expressive and creative.
Spectrominoes
This is a paper version of a domino game based on the color addition rules of Al-Jabar designed by Robert Schneider.
Spiram Siderum
A craft kit with all parts needed to crate a tiny kinetic sculpture based on the physics of equilibrium, magnetic force, and angular momentum.
Spixel Puzzle
On the picture you can see the visual design of my Gift Exchange item. The object is based on aligning RGB Spidron puzzles.
Sudoku Ripeto and Custom Sudoku Books
Sudoku Ripeto and Custom Sudoku are the first Sudoku variants with repeated numbers and letters (please visit www.customsudoku.com). As such, they require new solving tricks and techniques.
I am glad to offer an assortment of books featuring…
I am glad to offer an assortment of books featuring…
Surface Tension Bar Bet
It is a set of objects (one yen, match, cheerio, etc.) with a small instruction sheet for puzzle/ bets and references.
Surprise! Puzzles
A small booklet of 20 math puzzles that involve the element of surprise. Some appear to lack sufficient information to solve; others run counter to one's intuition as to what the answer should be.
Tensegritiy Pop-up
In each envelope there will be Kenneth Snelson-like tensegrity flattened inside. As you pull it out, it will pop up to a 3D sculpture.