Hi taliyev,
A CAT is really a 'measuring device' - when used correctly, it will give you a realistic score and help define your strengths and weaknesses, but it will NOT help you to fix any of those weaknesses. To raise your scores, you have to put in the necessary practice and repetitions. The CAT will show you whether your studies are helping you to improve or not. The ClubTests, while a useful tool, are not comparable to the Official GMAT because you will have to go through about 1.5 hours of other activities on Test Day BEFORE you see your first Quant question (while you won't have to do any of that while taking a ClubTest). Test Day is a specific situation and these details will factor into your performance.
With a Q47, your math skills/knowledge are likely great - to Improve your Quant skills though, you need study materials that put an emphasis on Quant Tactics, patterns and all the little 'secrets' to that section of the Test. Working through random practice questions and taking lots of CATs will likely NOT provide you with any of those things.
GMAT assassins aren't born, they're made,
Rich