Great question!
If somebody asks you, "Que edad tienes," which means "How old are you? (I'll use my age as an example.)
"Tengo catorce anos," which means "I am fourteen years old."
So, it would sound -
"How old are you?"
"I am fourteen years old."
"Que edad tienes?"
"Tengo catorce anos."
Hope this helps! :D
