Although for some, studying these few GMAT books is enough to crack 99 percentile in the math, others are not able to crack the 600 barrier itself. What might be the reason?
Well, I feel that students who excel in math since school stand a better chance of cracking GMAT math with a minimal preparation.
For the others, who are just starting their math journey, not only they have to read the GMAT OG,they have to read basic math concept books, problem solving books, etc...GMAT OG and other GMAT books, just scratch the surface while preparing for math. First it is required to tune your brain to work with numbers and then numbers and words. The GMAT math books does not cover the entire skills which is required to reach 51 raw score in the GMAT math..
Watch this video. Some of the books mentioned will cover the additional sources which you need to refer to develop
1. math concepts
2. math reasoning
3 GMAT math.