I would tell ONLY if it wouldn't hurt the person who asked. People think that you are breaking some kind of Biblical law if you "lie" about ANYTHING!! Almost always, people should be honest. You don't have to answer questions if you don't wish to (discounting being questioned by an officer, or in court.) Sometimes you do harm when honest, and you wish you had kept your mouth shut. If you gauge it by asking yourself if YOU would be hurt if the same thing happened to you, you will know the difference.