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quinary number system

mathematics
Also known as: base-5 number system, quinary scale

Quick Summary

The quinary number system, also known as a base-five system, is a method of expressing numbers where each number is a sum of powers of five. While the decimal system (base-10) is most common, other bases exist, such as the binary system (base-2) used in computers.1

The quinary scale, or base-five system, is ancient. In pure form, it is currently used by speakers of the Saraveca language in South America. Elsewhere, it is often combined with the decimal system or the vigesimal system (base-20). A related concept is the biquinary system, which represents decimal digits as pairs of digits in base-2 and base-5.23

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