I read somewhere online that the problem sets at the end of each chapter in the Manhattan GMAT books are from the Official Guide. Is that true? I thought they weren't and only the problems listed at the end of each guide were all the Official Guide problems that covered the topics addressed in each guide.
As an aside, in following the in-class curriculum, the weekly homework is heavily slanted towards the problem sets at the end of the chapters. If these are not from the OG, are these helpful at all? Isn't it better to just test your knowledge on OG problems rather than spending a ton of time on these chapter problem sets?
Thank you.