It's the Official Guide - a book that contains real, retired GMAT questions. You'll see the BTG review here:
https://www.beatthegmat.com/books.html
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What is OG????
Source: Beat The GMAT — GMAT Strategy |
The OG is the "Official Guide".
There is one OG for verbal and math combined (it's a big red book; the older edition is a big orange book). There are also OG supplements with additional verbal and math problems. The verbal supplement is purple and the math is green.
There is one OG for verbal and math combined (it's a big red book; the older edition is a big orange book). There are also OG supplements with additional verbal and math problems. The verbal supplement is purple and the math is green.
Jim S. | GMAT Instructor | Veritas Prep
















