Ordinal numbers

Ordinal numbers

1st first                           18th eighteenth
2nd second                    19th nineteenth
3rd third                         20th twentieth
4th fourth                       21th twenty-first
5th fifth                          22nd twenty-second
6th sixth                         30th thirtieth
7th seventh                    40th fortieth
8th eighth                       50th fiftieth
9th ninth                         60th sixtieth
10th tenth                       70th seventieth
11th eleventh                  80th eightieth
12th twelfth                    90th ninetieth
13th thirteenth               100th hundredth
14th fourteenth              200th two hundredth
15th fifteenth               1,000th thousandth
16th sixteenth         1,000,000th millionth