I am planning to retake the GMAT and want to work on improving couple of areas in Math, specially geometry, coordinate geometry, and DS (inequalities). Can anyone recommend a good math book for the areas I want to improve? Or a good math book in general? Last time I only used the OG 11 and OG Quantitative Review books. Not sure if it is relevant, but my score in quant was a 40.
Thanks
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