How old is your grandmother?
She is sixty-eight years old.
Who's that?
She is my grandmother.
Who's that?
He is my grandfather.
How old is your grandfather?
He is seventy-three years old.
How old is your brother?
He is twenty years old.
How old is your mother?
She is thirty-four years old.
How old are you?
I'm twelve years old.
Is your sister fifteen years old?
No, she isn't.
Is your mother forty years old?
Yes, she is.