In common with the other Mesoamerican civilizations, the Maya used a base 20 (vigesimal) and base 5 numbering system (see Maya numerals). Also, the preclassic Maya and their neighbors independently developed the concept of zero by 36 BC
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Yes. Even so, that the Mayan numeral system was much more
complex than the decimal system we use now: Maya numerals were a
vigesimal (base twenty) numeral system.