Answer:
Tengo __ años
Step-by-step explanation:
In my Spanish class, we've learned about names, date of birth, where you are from, e.t.c. In Spanish, they are: ¿Cómo te llamas? ¿Cuando es tu cumpleaños? ¿De donde eres?
In other words, ¿Cuántos años tienes tú? means "How old are you?". However, this depends on your age, so I am not asking you to tell me your age, rather, I will tell you how to answer.
"Tengo __ años"
You may add your age on the blank.