To find a two-digit number that is divisible by 9, you can list the two-digit multiples of 9:
- 18
- 27
- 36
- 45
- 54
- 63
- 72
- 81
- 90
Any of these numbers would be correct for the blank, as they are all two-digit numbers divisible by 9.
If you have a specific blank in mind (e.g., __), you can choose one from the list above.