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In a vigesimal place system, twenty individual numerals (or digit symbols) are used, ten more than in the decimal system. One modern method of finding the extra needed symbols is to write ten as the letter A, or A 20, where the 20 means base 20, to write nineteen as J 20, and the numbers between with the corresponding letters of the alphabet.
The Mayan numeral system was the system to represent numbers and calendar dates in the Maya civilization. It was a vigesimal (base-20) positional numeral system. The numerals are made up of three symbols: zero (a shell), [1] one (a dot) and five (a bar). For example, thirteen is written as three dots in a horizontal row above two horizontal ...
The Kaktovik numerals or Kaktovik Iñupiaq numerals [1] are a base-20 system of numerical digits created by Alaskan Iñupiat. They are visually iconic, with shapes that indicate the number being represented. The Iñupiaq language has a base-20 numeral system, as do the other Eskimo–Aleut languages of Alaska and Canada (and formerly Greenland).
The Georgian numerals are the system of number names used in Georgian, a language spoken in the country of Georgia.The Georgian numerals from 30 to 99 are constructed using a base-20 system, [1] [2] [3] similar to the scheme used in Basque, French for numbers 80 through 99, [4] or the notion of the score in English.
The Welsh language continues to use a base-20 counting system, particularly for the age of people, dates and in common phrases. 15 is also important, with 16–19 being "one on 15", "two on 15" etc. 18 is normally "two nines". A decimal system is commonly used. The Inuit languages use a base-20 counting system.
The Kaktovik Numerals are a Unicode block for the Kaktovik numerals, a base-20 system of numerical digits created by Alaskan Iñupiaq. It was first encoded in Unicode version 15 in 2022. It contains 20 characters for representing each of the digits 0-19 in the base-20 place value numeral system of Iñupiaq and related Inuit, Yupik, and Unangan ...
"A base is a natural number B whose powers (B multiplied by itself some number of times) are specially designated within a numerical system." [1]: 38 The term is not equivalent to radix, as it applies to all numerical notation systems (not just positional ones with a radix) and most systems of spoken numbers. [1]
The Mayan numerals, with values 0–19 10 creating a base-20 system, are encoded in block Mayan Numerals. Notes