ILLEGAL: “How old are you? When did you graduate from college?”
LEGAL: “Are you over the age of 18?”
Whether you’re 18 going on 48 or 60 going on 40, employers are not allowed to discriminate against age (which is what the first question implies). However, when asked differently, the question becomes legal; the legal phrasing implies an age range, not a specific number. After all, the hospital needs to know its nurses are over 18 years of age to work legally in the U.S.