mi hisi gelea = 20 + 10.
40.

bar hisi = 2 x 20.
60.

api hisi = 3 x 20.
80.

upun hisi = 4 x 20.
100.

mone hisi = 5 x 20.
In the Nicobar Islands of the Indian Ocean a well-developed example of vigesimal numeration is found.