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The secret life of words
Barry Pawlik builds words and sentences from doubles
An odd card trick
Michael Wendl dissects some variants of the magic separation, a self-working card trick.
Top ten vote issue 08
Vote for your favourite Chalkdust regular
Top ten vote issue 05
Vote for your favourite geometry instrument
Roots: Pythagoras of Samos
Pythagoras gave us so much more than a² + b² = c²
Dear Dirichlet Christmas special
Agony uncle Professor Dirichlet answers your personal problems this Christmastime.
