How do you answer y cuantos anos tienes tu?

The phrase "y cuántos años tienes tú" in Spanish translates to "and how old are you?" in English.

To answer this question, you would say:

* "Tengo [your age] años."

For example:

* "Tengo 25 años." (I am 25 years old.)

* "Tengo 18 años." (I am 18 years old.)

* "Tengo 40 años." (I am 40 years old.)

It's also common to add "y tú?" (and you?) at the end of your answer to ask the other person their age.