Free Stuff

Sample Issue: word, logic, and number conundrums

Sundry Puzzles: not to be confused with the Sunday puzzle

Sundry Solutions

M.C. Escher and Islamic Design: a talk for Hartford, VT H.S.

The Puzzle Mall: free puzzle browsing on two levels. 16 stores (topics). (Portland handouts)

     Lower Level: arithmetic and middle grades math.

     Upper Level: high school math, geometry, logic.

 EscherSketches

The Isogrid Gallery: staying between the dots

The Penrose Wolf (requires Flash Player, a free download from Macromedia)

Constructing the Wolf

Links to other good math and puzzle sites

About Uncle Bob

TIP

TIP2