Fleet_of_Foot
Member
How am I wrong? I witnessed it first hand, every year, during college. For my first 2 years, I bought the prior year edition and attempted problem sets, only to find the questions were reordered and mixed on different pages. It would often take me much longer to complete assignments because I spent a huge amount of time trying to match questions up.
I'm not saying that didn't happen. It definitely does. For good and obvious reasons. I'm saying there was a certain amount of other content in the book that changed, too.
If we are adding new content to each chapter, then yeah, the page numbers will change. Sometimes we take out chapters completely, or add new chapters. There is no consideration given to keeping page numbers consistent between editions just to make it easier for you not to buy our newest, most expensive product. Sorry about that.
The authors will change the numbers in problem sets for a variety of reasons. The main one is that if someone gets hold of the instructor's manual (where the answers are), they're only going to benefit from it for one edition.