A traditional counting system still in use in many regions of Asia works in this way, and could help to explain the occurrence of numeral systems based on 12 and 60 besides those based on 10, 20 and 5.
Aínda existe un sistema de conta tradicional en moitas rexións de Asia que pode explicar a existencia de sistema numéricos baseados en 12 e 60 ademais dos que se basean en 10, 20 e 5.