Hi, thanks for your reply.
It seems to me that you may still have some gaps in Quant topics. I would suggest that you should practice question one topic at a time, and try to get your accuracy up to more than 90% in medium questions across topics. Imo it will be a better investment of your time.
In addition to what people have advised above, another GMAT Club Youtube video may also provide you with some perspectives on GMAT Focus scoring:
ShreyTandonn
Yeah I'm averaging 14 - 16/21. I'm still getting the hard questions wrong though. Easy accuracy is 100% with medium on the lines of 85-90% accuracy. Hard questions are just pure guesswork to be honest.
yc168
What is your current sectional score in Quant?
Do you have any data on your current accuracy % in Easy, Medium and Hard questions, respectively?
bb has laid out the principles very clearly above. A more specific suggestion will likely depend on where you are right now.