Onur 16

1. #15: Base 60
• Sumerians devised a number system based on 60.
• One of the main differences between our system and theirs is the number of
factors; 1, 2, 3, 4, 5, 6, 10, 12, 15, 20, 30, and 60 for base sixty and 1, 2, 5, and
10 for base ten.
• Because of their mathematics, the Babylonians and Maya had elaborate and
fairly accurate measurements of time and the calendar.
Links: http://ancienthistory.about.com/od/abacus/a/BabylonianMath.htm