1.Bob put down the sheet of paper. "Fifteen questions in all and some real tough ones," he said. "How did you both get on?" "Jane answered twice as many as I missed," replied Andy. "And she missed exactly a third as many as I answered. I think she did better than I did." How many had each of them answered?

Andy answered 9, Jane 12 questions

Andy answered 11, Jane 16 questions

Andy answered 6, Jane 18 questions