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do any of the questions from 9th duplicate with 10th edition... iam still waiting for my 10th edition from ebay and i am debating whether to order the 9th as well or 8th ?? is it worth it // will i get more examples and practice without duplicating questions and waisting money ??
You have got to be kidding. Virtually everything that is older edition is in the 10th ed and there is no reason to buy older eds, IMO. A caveat - I just glanced through them and have not looked at the questions in detail.