Ron Eglash: African fractals, in buildings and braids
Nice! I have little tricks for doing arithmetic quickly in my head, but that just blew my mind.
I went to college with Art, he’s been doing this schtick for about 25 years, it’s darned impressive.
if you care to look at my blog for 29th Feb 2008, the URL is
I show my readers how to take integer cube roots of e.g. six digit numbers , IN THEIR HEADS, faster than most people can enter the 6 digits in a calculator. Go try it
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