I currently only have the 12th edition of the Official Guide. Is it worthwhile to get the OG 11 or 10? Or is there a lot of overlap with the same questions?
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Well I have gone trough OG 10 and now I am doing OG 12 , There is a huge overlap , but of course there are some new questions in either one. I would better recommend buying OG 12 and verbal and quant supplements.
