Letters Puzzle Game

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 repeated letters quicker than your opponent. Submitted by: Jeremiah Farrell Time...
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...
Dots on a Circle

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 other theories and relationships. Submitted by: James Tanton Time Required:...