Babylonian and Mesopotamian Mathematics.This website is not a primary source, but it contains photographs of cuneiform tablets that are primary sources. It also contains detailed explanations of Mesopotamian mathematics. Ancient Mesopotamian cultures (Sumer, Akkad, Babylon) had a base 60 numbering system without the number zero. They were able to do geometry and trigonometry, which they used for land surveying and astronomical time-keeping/astrology. They also used arithmetic in business and taxation.