The only number above 20 which is used as a unit is 200, which is expressed merely as 10 twenties.

Any even number of hundreds, or any number of thousands, is then indicated as being so many times 10 twenties; and the odd hundreds are so many times 10 twenties, plus 5 twenties more.

This scale is an excellent example of the cumbersome methods used by uncivilized races in extending their number systems beyond the ordinary needs of daily life.
In Central Asia a single vigesimal scale comes to light in the following fragment of the Leptscha scale, of the Himalaya region:[354] 10.

kati.
40.

kafali = 4 x 10, or kha nat = 2 x 20.
50.