) is a numeral system
as the base. This originates from the five fingers
on either hand
In the quinary place system, five numerals from 0 to 4, are used to represent any real number. According to this method, five is written as 10, twenty-five is written as 100 and sixty is written as 220.
Many languages use quinary number systems, including Gumatj
,, Kuurn Kopan Noot
. Of these, Gumatj is the only true "5-25" language known, in which 25 is the higher group of 5. The Gumatj numerals are shown below:
|| Numeral |
|| wanggany |
|| marrma |
|| lurrkun |
|| dambumiriw |
|| wanggany rulu |
|| marrma rulu |
|| lurrkun rulu |
|| dambumiriw rulu |
|| dambumirri rulu |
|| marrma dambumirri rulu |
|| lurrkun dambumirri rulu |
|| dambumiriw dambumirri rulu |
|| dambumirri dambumirri rulu |
|| dambumirri dambumirri dambumirri rulu |
A decimal system with 5 as a sub-base is called biquinary, and is found in Wolof and Khmer. A vigesimal system with 5 as a sub-base is found in Nahuatl and the Maya numerals.
Roman numerals are a biquinary system. The numbers 1, 5, 10, and 50 are written as I, V, X, and L respectively. Eight is VIII and seventy is LXX.
The Chinese and Japanese versions of the abacus use a biquinary system to simulate a decimal system for ease of calculation.
Urnfield culture numerals and some tally mark systems are also biquinary.