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id maya-numerals
name Maya numeral system
appeared -300
tags numeralSystem
description The Maya numeral system is a vigesimal (base-20) positional numeral system used by the Pre-Columbian Maya civilization. The numerals are made up of three symbols: zero (a shell shape), one (a dot), and five (a bar). For example, the number nineteen is written with three bars and four dots.

wikipedia https://en.wikipedia.org/wiki/Maya_numerals