Announcing G4G13 Featured Presenters
G4G13 Featured Presenters PROFESSOR ERNO RUBIK G4G is pleased to announce that Professor Ernő Rubik will make a very rare public appearance in Atlanta in April 2018. “In conversation with Ernő Rubik” (7:00 …
Stacks Game
Be the first player to move all pieces across and off the board to win this 2-player strategy game. Decide between defensive and offensive strategy as you choose to move …
Remembering Laurie Brokenshire
It is with great sadness that G4G notes the death of longtime G4G community member Laurie Brokenshire (Oct 20, 1952 – Aug 4, 2017) from England. A noted …
How to Fold a Trihexaflexagon
Use the included templates to create these folded paper polygons that appear to have two sides. Follow the step-by-step instructions to form the included patterns, or use the included templates …
Crocheting a Mobius Strip
Use a combination of chain stitches and double crochet stitches to crochet a Mobius Strip as large or small as you wish. Using a new material, such as yarn, to …
Map Colouring and the Four Colour Theorem
Can you colour this map using only four colors? The Four Colour Theorem says that no more than four colours can be used so that the regions that share a …
Drawing Pursuit Curves
When predators hunt their prey they move along pursuit curves which can turn into logarithmic spirals when the right factors align. Recreate this pursuit on paper to explore this concept, …
Rubik’s Magic
Own a Rubik’s Magic or found yourself curious about how they work? These videos reveal some of the near endless constructible configurations to be explored. Bonus! If you are the …
World’s Greatest Mathematical Card Trick
Invented by mathemagician Art Benjamin, shared by mathematician and prolific puzzle author Ian Stewart, and published by Author Garth Sundem, The World’s Greatest Mathematical Card Trick is a search to …
Letters Puzzle Game
First, complete the puzzle by using each of the letters from ‘Celebration of Mind’ three times to fill in this puzzle with 13 words. Then, play head-to-head to cover up …
Recreational Mathematics
Martin Gardner recounts 25 years of puzzles and discoveries in this Scientific American article. Many of his very own puzzles are featured and their mathematical solutions are described in depth …
Square Permutations
Do square permutations always exist? Work through solutions and scenarios through this exploration activity. Submitted by: James Tanton Time Required: 30 minutes You’ll Need: paper and pencil Download Activity
Dividing Squares into Triangles
Explore the complexities in dividing squares into triangles. How many different ways can you divide a square into triangles of equal area? Attempt to answer this question, and others, while …
Dots on a Circle
How many regions are created by connecting dots with line segments intersecting parts of a circle? Explore what happens when those dots are placed haphazardly versus symmetrically, as well as …
Playing with Evens and Odds
Explore the concept of handshakes through this twist on connect-the-dots. Draw lines, representing handshakes, between dots, representing people, so that the number of lines drawn matches the number next to …
Playing Pool
Explore angles as you theoretically shoot pool balls across grid paper in an attempt to land them in the pockets of the pool table. Where will the ball land if …
Checkerboard Power
Explore the results of a variety of movements around a checkerboard. See how a piece’s step count, its movement pattern and the board itself can affect the outcome of a …
Sliding Around
Robert A. Hearn’s Martin Gardner-inspired, coin-sliding puzzle takes sliding-coin puzzles to the next level. Instead of solving the puzzle in the fewest number of moves, these puzzles are similar to …
Math Puzzle Booklets
The Julia Robinson Mathematics Festival has gathered 44 pages of fun, mathematical puzzles. Solve squareable and trapezoidal numbers, staircase numbers, word and non-word puzzles, logic puzzles, and more with these …
Coin Puzzles
This selection of coin Puzzles was first submitted by ThinkFun, now part of Ravensburger, as part of their Puzzle Playground. As the original website no longer exists we have been …