## Archive for the ‘Puzzle’ Category

### Puzzler: a squarable region from Leonardo da Vinci

Posted by: **Dave Richeson** on June 18, 2012

### A pyramidologist’s value for pi

Posted by: **Dave Richeson** on April 27, 2011

### A game for budding knot theorists

Posted by: **Dave Richeson** on August 24, 2010

### The left-handed boy problem

Posted by: **Dave Richeson** on August 5, 2010

### Mathematical magic tricks for kids

Posted by: **Dave Richeson** on August 2, 2010

### A card trick that will probably amaze your friends (solution)

Posted by: **Dave Richeson** on March 15, 2010

### A card trick that will probably amaze your friends

Posted by: **Dave Richeson** on March 15, 2010

### Kindergarten mathematics

Posted by: **Dave Richeson** on October 12, 2009

### More on twin primes and Pythagorean triples

Posted by: **Dave Richeson** on August 26, 2009

### What is a howicide?

Posted by: **Dave Richeson** on August 15, 2009