Numbers 20 - 30: Twenty - veinte, Twenty-one - veintuno, Twenty-two - veintidós, Twenty-three - veintitrés, Twenty-four - veinticuatro, Twenty-five - veinticinco, Twenty-six - veintiséis, Twenty-seven - veintisiete, Twenty-eight - veintiocho, Twenty-nine - veintinueve, Thirty - treinta