Clearing up the confusion between order-dependent and order-independent groupings.
Once you understand a concept, do the practice sets. The GMAT is a timed exam, so once you feel comfortable with the math, start timing yourself. Aim for an average of 2 minutes per question. 3. The Error Log gmat math bible novapdf
– Used to measure strengths and weaknesses to direct further study. Key Features gmat math bible novapdf