How old is your ___________? (50)
My grandmother is fifty years old
How old is your ___________? (40)
My father is forty years old.
How old is your ___________? (55)
My grandfather is fifty-five years old
How old is your ___________? (8)
My sister is eight years old.
How old is your ___________? (12)
My brother is twelve years old.
How old is your ___________? (38)
My mother is thirty-eight years old.