1) I have posted the answers
2) I made this list by retaking several times the freely available GMATPrep I on mba.com. Each time you repeat the exam you do see questions you have seen before but you also see many new questions. So whenever i took the test I wrote down all the questions and answers and then retook the test. Obviously, I knew the answers to the questions I had seen before and so got them correct. What this does, however, is to give you access to the very hard questions. Each time I took the test I wrote down the new questions and repeated the test. I did this at least 10 times and I still don't think I exhausted the question bin in GMATPrep I
3) Is what I did legal? Absolutley! I am a lawyer so there are no copyright violations because 1) this material is freely available on GMATPrep on mba.com if you just put in the effort, and 2) it only violates copyright if I try to sell it, which I have not done. So don't worry.
4) Some people have correctly noted that some questions are not 700 level. This is because to get access to the 700 level questions you have to go through 1 or 2 easier ones. But I would say that at least 90 of the 99 are 700 level questions. If you feel they are too easy then good for you. Just remember some topics are easier for different people than others. All I can say is most of these questions are questions that come from getting the first 10 questions correct.
5) Again, my purpose was simply to compile a list of the more difficult questions. And to learn from them by figuring out why the correct answer was correct.
I will post another set of 99 questions soon.
Enjoy!