5 ms·
Professor Trachtenberg (early 1900) comes to mind for doing speed math.
by no-espam 15y ago
Professor Trachtenberg (early 1900) comes to mind for doing speed math.
- no-espam 15y agoWow, downvoted for posting info related to a professor who was held in nazi concentration camp and kept his mind lucid with math? http://en.wikipedia.org/wiki/Trachtenberg_system http://en.wikipedia.org/wiki/Trachtenberg_system
- downx3 15y ago+1 for the Trachtenberg system. I only wish we were taught these methods at school, in addition to the 'normal' way...