vigesimal number system

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Mayan numbal system

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vigesimal number system

mathematics

Also known as: base-20 number system

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numeral systems

In numerals and numeral systems: Number bases
…with the decimal or the vigesimal system, where the base is 20. Similarly, the pure base six scale seems to occur only sparsely in northwest Africa and is otherwise combined with the duodecimal, or base 12, system.
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