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60 - Numberphile

2y ago
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The ancient Babylonians used a number system with base 60 (sexagesimal). Tablet image courtesy of Bill Casselman and Yale Babylonian Collection - more at http://www.math.ubc.ca/~cass/Euclid/ybc/ybc.html This video features Thomas Woolley - he tweets at https://twitter.com/#!/thomasewoolley Website: http://www.numberphile.com/ Numberphile on Facebook: http://www.facebook.com/numberphile Numberphile tweets: https://twitter.com/numberphile Videos by Brady Haran