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The sexagesimal (base-sixty) is a numeral system with sixty as the base. It originated with the ancient Sumerians in the 2000s BC, and was transmitted to the Babylonians. Sexagesimal as used in ancient Mesopotamia was not a pure base 60 system, in the sense that they didn't have 60 individual digits for their place-value notation. Instead, their cuneiform digits used ten as a sub-base in the fashion of a sign-value notation: a digit was composed of a number of narrow wedge-shaped marks representing units up to nine (Y, YY, YYY, YYYY, ... YYYYYYYYY) and a number of wide wedge-shaped marks representing tens up to five (
Sexagesimal - Wikipedia, the free encyclopedia