The Numbers 21-99
These are a piece of cake. You take the “tens” form and follow it by the last digit. Here's the full table for 20-29:
20       |
25      |
21  |
26  |
22   |
27  |
23  |
28  |
| 24 |
29 |
And here are the “tens” that will take us up to (but not including) 100:
| 30 |
| 40 |
50  |
| 60 |
70   |
80   |
| 90 |
Note the common ending 
for all of 30-90.
All the other numbers are formed in the same way you did the 20's. For example:
| 53 |
| 47 |
| 79 |
| << Numbers 1-19 | Numbers Index | Numbers 100-1000 >> |