National Council of Teachers of Mathematics
The Math Forum: Ask Dr. Math: Babylonian Number System
Dr. Math takes on a question about the Babylonian base-60 math system, explaining how a sexagesimal system looks and works in comparison with our decimal (base 10) system.
University of St. Andrews (UK)
University of St. Andrews: An Overview of Babylonian Mathematics
Information and examples of how the base 60 number system of the Babylonians worked in calculating problems similar to those we face today. Has a section comparing Pythagoras's theorem to Babylonian math.
University of Virginia
University of Virginia: Counting in Babylon
A discussion of the number system used by the ancient Babylonians. Examples are provided for various mathematical operations based on the number 60 (our number system is based on the number ten).