How do yu answer in spanish cuantos anos tienes?

The correct way to answer "Cuántos años tienes?" in Spanish is:

"Tengo [your age] años."

For example:

* If you are 25 years old: "Tengo 25 años."

* If you are 18 years old: "Tengo 18 años."

Breakdown:

* "Tengo" means "I have"

* "[your age]" is your numerical age

* "años" means "years"

Let me know if you have any other questions!