The Maya of Central America designed one of the most complex and accurate calendar systems known. This calendar system was based heavily on Mayan mathematics, including the Mayan base-20 numbering system. Arising in isolation from the world's...

The Pre-Columbian Maya civilization used a vigesimal (base-twenty) numeral system. The numerals are made up of three symbols; zero (shell shape), one (a dot) and five (a bar). For example, nineteen (19) is written as four dots in a horizontal row above...