In my copy of the OG it seems there is only a chapter explaining the questions types, but I've heard people mention "OG IR questions", and at the back of the book there is an answer sheet to some 50 questions.
Am I missing something here? Are the questions on some mystery page I can't seem to find?
If you bought the original copy, you would get a Code (ID) that you can use to access IR at GMAT official site.
Otherwise you can buy these questions separately from GMAC.
Hope it helps
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