# Browse Items (79 total)

- Tags: Puzzle

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## 4!-Fold 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!

**Tags:**
G4G14, polycube, polyominoes, Puzzle

## 14 Rabbiducks

The puzzle is to fit 14 “rabbiduck” polyomino pieces into an 8x11 rectangle. (Gardner wrote about polyominoes in multiple columns. The specific polyomino pieces used are inspired by the rabbit/duck illusion that Gardner called the Rabbitduck in his…

**Tags:**
G4G14, Puzzle, Recreational Math

## The Art of Destroying Flexagons

Destroying flexagons can be fun and artistic! We suggest 4 different ways to artistically destroy flexagons, each with its own merit. Our exchange gift is a set of 4 flexagons strips, one for each demonstration and the attached explanation sheet.

**Tags:**
G4G14, Puzzle, Recreational Math, Toy

## Rep-Tile Tangram

The gift will be a number of cut-out pages to create a rep-tile tangram: A tangram shape that is made from tangram shapes, that are made from tangram shapes.

**Tags:**
G4G14, Puzzle, Recreational Math

## Traveling Through the Sierpinski Carpet and Menger Sponge

An ant wants to travel from one corner of the Sierpinski carpet to the opposite corner using the shortest possible route. And his friend, a termite, wants to do the same in the Menger sponge. Can you guide them well?

**Tags:**
G4G14, Puzzle, Recreational Math

## Penrose P3

I am making paper flexagons with Penrose patterns on them to illustrate the patterns. My stuff touches three things from Martin Gardner, Flexagons, Penrose Tiles, and Polyominos (the classification system for tetraflexagons is based on these with a…

**Tags:**
Art, G4G14, Puzzle, Recreational Math

## A Torus Without Diagonals

Cut-and-fold a polyhedron with 7 vertices, 14 faces, 21 edges, and a hole through it like a doughnut. A cube has internal diagonals that connect the diametrically opposite corners. By contrast, this polyhedron has no internal diagonals. There are…

**Tags:**
G4G14, Puzzle, Recreational Math

## I AM THE RHOMBUS

In one package: the strip of triangles and brochure for this new flexagon. The colorfully illustrated brochure will include folding directions, flexing directions, and images of the different possible faces.

**Tags:**
G4G14, Puzzle, Recreational Math

## StarHex-14: Theo Geerinck's 14 Polystars

14 tiles consisting of hexagons with 0 to 6 equilateral triangles attached on their edges can be cut from card stock provided to solve the large collection of puzzle figures presented. Five colors, each tile shape is unique with one mirror pair.…

**Tags:**
G4G14, Puzzle, Recreational Math

## Octaroller

BUILD your OCTAROLLER ! from 3 parts square.

RACE your OCTAROLLER ! down the ramp in a straight line.

CHEER your OCTAROLLER ! with supplied cheering pom pom on a toothpick.

Octaroller is included in Geometric Foundations of Design: Old and New…

RACE your OCTAROLLER ! down the ramp in a straight line.

CHEER your OCTAROLLER ! with supplied cheering pom pom on a toothpick.

Octaroller is included in Geometric Foundations of Design: Old and New…

**Tags:**
G4G14, Puzzle, Recreational Math

## A G4G14 Puzzle

This is a paper ring with a number puzzle. The hint is actually the logo that is at the beginning (which of course will be right after the end when it's a ring).

**Tags:**
G4G14, Puzzle, Recreational Math