Nummbaaji limngal kiiɗɗi kawtuɗi e bayaanu darnde maaji ɗi daraaki dow toɓbere, kawtuɗi e sexagesimal (tekkere 60) laawol ngol limngal Babylon'en, e maa vigesimal (tekkere 20) laawol kaalungol dow limngal yimɓe Maya.