. ▁ ▁Amer icas ▁ ▁Tw enty ▁was ▁a ▁base ▁in ▁the ▁May a ▁and ▁Az te c ▁number ▁systems . ▁The ▁May a ▁used ▁the ▁following ▁names ▁for ▁the ▁powers ▁of ▁twenty : ▁ ▁( 2 0 ), ▁ ▁( 2 0 2 ▁= ▁ 4 0 0 ), ▁ ▁( 2 0 3 ▁= ▁ 8 , 0 0 0 ), ▁ ▁( 2 0 4 ▁= ▁ 1 6 0 , 0 0 0 ), ▁ ▁( 2 0 5 ▁= ▁ 3 , 2 0 0 , 0 0 0 ) ▁and ▁ ▁( 2 0 6 ▁= ▁ 6 4 , 0 0 0 , 0 0 0 ). ▁See ▁also ▁May a ▁numer als ▁and ▁May a ▁calendar , ▁May an ▁languages , ▁Y uc ate c . ▁The ▁Az te c ▁called ▁them : ▁ ▁( 1 ▁× ▁ 2 0 ), ▁ ▁( 1 ▁× ▁ 4 0 0 ), ▁ ▁( 1 ▁× ▁ 8 , 0 0 0 ), ▁ ▁( 1 ▁× ▁ 2 0 ▁× ▁ 8 , 0 0 0 ▁= ▁ 1 6 0 , 0 0 0 ), ▁ ▁( 1 ▁× ▁ 4 0 0 ▁× ▁ 8 , 0 0 0 ▁= ▁ 3 , 2 0 0 , 0 0 0 ) ▁and ▁ ▁( 1 ▁× ▁ 2 0 ▁× ▁ 4 0 0 ▁× ▁ 8 , 0 0 0 ▁= ▁ 6 4 , 0 0 0 , 0 0 0 ).