Final answer:
The number 5 is the only number equal to 5.
Step-by-step explanation:
To determine which of these numbers are equal to 5, we need to look at each option:
- 2 is not equal to 5.
- 5 is equal to 5.
- 9 is not equal to 5.
Therefore, the number 5 is the only number equal to 5.