Hi neetakarnik,
I’m sorry to hear how things went with your GMAT. The score decrease could have resulted from a number of things. The most likely reason for the difference between your scores on practice tests and your score on the real GMAT is that in your preparation, you did not really learn to do what you have to do in order to score high on the actual GMAT. Rather, you picked up on some patterns that were effective in getting you relatively high scores on practice tests. So, to hit your GMAT score goal (which I believe is 700+), you probably have to adjust the way that you’ve been preparing.
Although you self-admittedly are less confident in quant than you are in verbal, since you scored low in both, I recommend focusing on both so that you are able to maximize your score increase on your next GMAT. To improve your skills, your preparation is going to have to be more complete, meaning that you have to go through quant and verbal carefully to find your exact weaknesses, fill gaps in your knowledge, and strengthen your skills. The overall process will be to learn all about how to answer question types with which you currently aren't very comfortable and do dozens of practice questions category by category, basically driving up your score point by point. When you do dozens of questions of the same type one after the other, you learn just what it takes to get questions of that type correct consistently. If you aren't getting close to 90 percent of questions of a certain type correct, go back and seek to better understand how that type of question works, and then do more questions of that type until you get to around at least 90 percent accuracy in your training. If you get 100 percent of some sets correct, even better.
In order to follow the path described above, you may need some new quant and verbal materials, so take a look at the GMAT Club reviews for the
best quant and
verbal courses.
You also may find my article with more information regarding
how to score a 700+ on the GMAT helpful.
If you’d like more specific advice on how to improve your quant and verbal skills, feel free to reach back out.
Good luck!