Division by Zero

A blog about math, puzzles, teaching, and academic technology

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RT @JohnDCook: Grover Cleveland totally looks tike Vernon Dursley ow.ly/lcZQQ 12 minutes ago
Math Horizons articles do not have footnotes, but as editor, I may allow them if look like this. | xkcd bit.ly/12nzsba 15 hours ago
RT @shipmath: Set theory in the mainstream media...... fb.me/1V3WGqCQN 16 hours ago
Cool finger paintings by Iris Scott | Colossal bit.ly/16IBGYC 16 hours ago
Hinged table inspired by Henry Dudney's haberdasher's puzzle — Kickstarter kck.st/YTlHlH 19 hours ago