I think the only reason why that kind of textbook just has answers for only odd questions is you have to solve the even questions yourself. I have few textbooks and those just have answer for odd or even questions, not all of them. Anw good luck, hope you can find it.
yes I believe that this type of text book wont have all the answer in so I guess that you might need to find some one that can answer all the questions for you $5 dollars want cover that so maybe ask someone to get the answers and get them to give u a price as all type of text book on this subject and others are there to test you so I don't thing you will find a copy with all the answers already done for you