Vigesimal numbers use the number 20 as the base number for counting.

The decimal system is the same as the vigesimal system up to 19.

As in French, the vigesimal system is widely used, particularly in people's ages.

This is a historic remnant of a vigesimal system.

The Maya used the vigesimal system for their calculations - a system based on 20 rather than 10.

There are only a few vigesimal traces left.

The vigesimal system (counting in base 20) is thought to originate from humans’ fingers and toes.

Each succeeding level of multiplication followed the vigesimal system.

Vigesimal systems are common in Africa, for example in Yoruba.

The tens follow a vigesimal system from forty up, with the exception of fifty:

The system was vigesimal (base twenty), so it has twenty digits.

Vennemann regards the vigesimal system as a trait of the Vasconic language.

The vigesimal system remains in robust use.

All the languages of Mesoamerica have vigesimal, or base twenty numeral systems.

The Burushaski number system is vigesimal, i.e. based on the number 20.

The system is, as is the Basque system of counting in general, vigesimal.

In addition, the language employs counter words when quantifying nouns and uses a vigesimal number system.

A haab' consists of vigesimal days, octodecimal months, and base-52 years forming a round.

In common with the other Mesoamerican civilizations, the Maya used a base 20 (vigesimal) system.

A modern national language which uses a full vigesimal system is Dzongkha in Bhutan.

The Nordic vigesimal system may possibly derive ultimately from the Celtic.

Parya employs some vigesimal numeral counting patterns, though the base words used are Hindi.

The 20th day is also the concluding day of all vigesimal periods, including the katun and baktun.

Like all other languages of the Mesoamerican linguistic area, Otomi has a vigesimal number system.

The Kharosthi numeral system behaves like a partial vigesimal system.