Answers for ADX are incorrect. I really hate to give 1 star but as this is supposed to prepare you for your written I cannot morally give any higher score. Multiple aerodynamics questions are scoring incorrect answers as correct and correct answers as incorrect. it doesn't clarify whether the answer is being SCORED as correct on the real ADX and so you should ignore it and just put what it tells you, like Sheppard does. it marks corrects answers wrong. Stay away, don't learn wrong answers.