P.S. You can ask yes/ no questions ONLY. i.e., questions with answer either yes or no. You can't ask other type of questions.
C'mon.. You obviously don't have and maps (not even google maps!) Otherwise you'll get the answer wrong.
And oh. please! You can't test who is the liar and who is the truthful one by asking questions like are you a man and all... Otherwise you'll get the answer wrong.