The base-20 notational system for representing real numbers. The digits used to represent numbers using vigesimal notation are 0, 1, 2, 3, 4, 5, 6, 7, 8, 9, A, B, C, D, E, F, G, H, I, and J. A base-20 number system was used by the Aztecs and Mayans. The Mayans compiled extensive observations of planetary positions in base-20 notation.

# Vigesimal

## See also

Base, Binary, Decimal, Hexadecimal, Octal, Quaternary, Ternary## Explore with Wolfram|Alpha

## Cite this as:

Weisstein, Eric W. "Vigesimal." From *MathWorld*--A Wolfram Web Resource. https://mathworld.wolfram.com/Vigesimal.html