Problem Solving

A very nice Beatthegmat staffer told me that I could post here. I have put together some video explanations to 6 high-level Problem Solving questions from the OG diagnostic. These free videos are part of my free preview for my upcoming online GMAT math course, which will be released in the Fall of 2012. At this point, I'm trying to figure out whether I'm on the right track. I'm not selling anything or trying to spam anyone. In fact, I believe that my videos could be a real help to a lot of students. Any feedback would be wonderful.

The videos can be seen at: https://www.testtrainerinc.com/GMAT-Videos.html The OG explanations start with the third video.

The videos deal with: probability OG diagnostic #7, geometry OG diagnostic #10, counting OG diagnostic #11, remainder OG #13, products OG #15, and rates OG #24.