Ordinal Numbers
| 1st first | 11th eleventh | 10th tenth | 100th one hundredth |
| 2nd second | 12th twelfth | 20th twentieth | 200th two hundredth |
| 3rd third | 13th thirteenth | 30th thirtieth | 300th three hundredth |
| 4th fourth | 14th fourteenth | 40th fortieth | 400th four hundredth |
| 5th fifth | 15th fifteenth | 50th fiftieth | 500th five hundredth |
| 6th sixth | 16th sixteenth | 60th sixtieth | 600th six hundredth |
| 7th seventh | 17th seventeenth | 70th seventieth | 700th seven hundredth |
| 8th eighth | 18th eighteenth | 80th eightieth | 800th eight hundredth |
| 9th ninth | 19th nineteenth | 90th ninetieth | 900th nine hundredth |
| 1,000th thousandth | 10,000th ten thousandth | 100,000th hundred thousandth | 1,000,000th millionth |
| 21th twenty-first | 31th thirty-first | 41th forty-first |
| 22th twenty-second | 32th thirty-second | 42th forty-second |
| 23th twenty-third | 33th thirty-third | 43th forty-third |
| 24th twenty-fourth | 34th thirty-fourth | 44th forty-fourth |
| 25th twenty-fifth | 35th thirty-fifth | 45th forty-fifth |
| 26th twenty-sixth | 36th thirty-sixth | 46th forty-sixth |
| 27th twenty-seventh | 37th thirty-seventh | 47th forty-seventh |
| 28th twenty-eighth | 38th thirty-eighth | 48th forty-eighth |
| 29th twenty-ninth | 39th thirty-ninth | 49th forty-ninth |
