mengyao1126
ohh you think my way direct start from tons of question is very difficult to master yea.
I second that. In fact, a great way to prep is with topical learning and practice. In other words, be sure to focus on just ONE quant or verbal topic at a time and practice just that topic until you achieve mastery. If you can study that way, you will start seeing incremental improvement.
For example, let's say you are studying Number Properties. First, you'll need to learn all you can about that topic, and then practice only Number Property questions. After each problem set, thoroughly analyze your incorrect questions. For example, ask yourself why if you got a remainder question wrong. Did you make a careless mistake? Did you not properly apply the remainder formula? Was there a concept you did not understand in the question?
By carefully analyzing your mistakes, you will be able to fix your weaknesses efficiently and, in turn, improve your GMAT quant skills. Number Properties is just one example; follow this process for all quant and verbal topics.
For some more tips on the best way to structure your studying, here is a great article:
The Best Way to Study for the GMATGood luck!