As the latter is due to finger-reckoning, so the use of the fingers and the toes produced a vigesimal scale.
It counted by units and scores; in other words, it was a vigesimal system.
Among the almost countless dialects of Africa we find a comparatively small number of vigesimal number systems.
The last of these scales is an unusual combination of decimal and vigesimal.
If use is made of the toes in addition to the fingers, the outcome must inevitably be a vigesimal system.
Any number system which passes the limit 10 is reasonably sure to have either a quinary, a decimal, or a vigesimal structure.
This long cycle was an application of the vigesimal system to their reckoning of time.
This leads the quinary into the vigesimal scale, and produces the combination so often found in certain parts of the world.
This completes the scanty list of African vigesimal number systems that a patient and somewhat extended search has yielded.
To the statement just made respecting the origin of vigesimal counting, exception may, of course, be taken.