Hi pawanCEO,
Taking a Q34 up to a Q41 is a nice improvement, but you still have a great deal of work to do to hit a Q50. With a Q41, you're likely performing well on prompts that are built on straight-forward "math", but you're missing out on a lot of strategy-based questions and DS points. As such, you probably need to focus more on tactics, pattern-matching, etc. than on practicing more math.
In that same way, questions that you think are "hard" might not be that hard, but "your way" of approaching the Quant section is making the process harder than it needs to be. I think that you would find the EMPOWERgmat Quant Score booster to be quite helpful. Most of our clients can complete that Study Plan in less than a month, so it's not too time consuming AND it will help you to pick up those strategy-based points that you're looking for.
Since you're planning on applying in September, when are you planning to take the GMAT?
GMAT assassins aren't born, they're made,
Rich