He is a teenager. Isn't he? -Yes. He is 16 years old.
She has just become an adult.
she is under 60
He is over 20
A boy isn't an adult yet
How old is that creaker? - Under 90
he just turned 20
He is my twin brother
she is far beyond 40
Are you twins? -yes
She is my age
You are vestal yet.
She is far beyond 70
How old are you? - Almost 30