Question

1. We can live to be 200.
2. We can live to be 200 years old.
3. We can live up to 200.
4. We can live up to 200 years.
5. We can live to 200.
6. We can live to 200 years.
7. We can live up to 200 years old.
8. We can live to 200 years old.
=====================
I have listed similar sentences. Which expressions could we use among them?

Answer 1

All are okay.

Answer 2

7 is probably the best