I'm from Brazil and I'm studying for GMAT for three months. My plan is to take the test soon, but my challenge has been the Quantitative session. I have a doubt about how the score works. In my preparation tests, I'm getting about 50% of the questions right, but it only counts a score of 25 and a percentile of 14%. I wish to know why is this happening and what can I do to improve my score and percentile. Do I need to get more questions right, or do I need to do well in the first 10 questions, or do I need to answer the easy questions right?
Thanks!

Bye