https://math.libretexts.org/Courses/Las_Positas_College/Math_27%3A_Number_Systems_for_Educators/03%3A_Numeration_Systems_and_Bases/3.03%3A_Historical_Counting_Systems/3.3.05%3A_The_Mayan_Numeral_System
3.3.5: The Mayan Numeral System - Mathematics LibreTexts
Oct 1, 2020 - In this chapter, we discussed the the Mayan civilization (1500 B.C.E to 1700 C.E.) that actually used a base system other than 10.
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