Il numero 13, tredici in Italiano, in Inglese si dice thirteen.
Il numero ordinale 13° in inglese si dice thirteenth.
4: four 5: five 6: six 7: seven 8: eight 9: nine 10: ten 11: eleven 12: twelve 14: fourteen 15: fifteen 16: sixteen 17: seventeen 18: eighteen 19: nineteen 20: twenty 21: twenty-one 22: twenty-two