20 16 is it ok to use the sixth edition of advanced mathematics for postgraduate entrance examination? Now there is a new seventh edition. Do you need to buy a new one to review? Is there a big difference between the two versions? There is not much difference in the general version. The review for postgraduate entrance examination mainly refers to the examination outline of that year, which will usually be published in June 10. 1 1, and find out what the main test was in that year by comparing with the examination outline. The textbook is only a reference book, and the version will not have much influence. Believe in yourself, come on!