Generally what I do is put something tangentially related to the question.
For example, "What's the name of your high school?" would be answered with something like "Khan Academy" (the name of a site that helped me) or "Mr. Jefferson" (A teacher, or best friend)
Mine was Rainy Purple Road. Then I get to educate the person on the phone to, in her personal life, never give the correct answer to anything googleable for a security answer. That usually involves a discussion of Sarah Palin...
Just put "Plymouth Creek High"
(Not to mention the possibility that some "security genius" will ban special characters on those answers)