There has been no change after the release of OG-12. If you look at the GMAC website you will see that the next major change is lined up only for 2012, nothing before that.
Has anyone in the forum given GMAT after the release of OG-12.
Has there been any change in the type,style or format of the questions.
I am giving GMAT on 30th of June...I have OG-11..is it sufficient or should i buy OG-12 as well.