Numbers 

1     one

2     two

3     three

4     four

5     five

6     six

7     seven

8     eight

9     nine

10    ten

11    eleven

12    twelve

13    thirteen

14    fourteen

15    fifteen

16    sixteen

17    seventeen

18    eighteen

19    nineteen

20    twenty

21    twenty-one

22    twenty-two

23    twenty-three

24    twenty-four

30    thirty

40    forty

50    fifty

60    sixty

70    seventy

80    eighty

90    ninety

100   a hundred