Recreational Mathematics

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 in this 1998 feature article. Source: Scientific American Time Required:...
Semi-Magic Squares

Semi-Magic Squares

Semi-magic squares are thought of as matrices in this arithmetic exploration. Split up a a shuffled deck of cards to create a magic-square out of playing cards with additional challenges. Submitted by: James Tanton Time Required: 30 minutes You’ll Need: paper, pencil,...
Square Permutations

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

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 solving multiple challenges throughout the activity. Submitted by: James...
Sliding Around

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 sliding-block puzzles in that there are specific places where...
Math Puzzle Booklets

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 four booklets packed full of challenges! Source:...