<p>If all the mistakes you’re making are out of carelessness, then you have to concentrate and be lucky enough to be one of the few to get a 2400. If you’re making mistakes on level 4-5 math questions, then you need to review your material adequately and practice with higher level math questions; consider Dr.Chung’s. Generally though, if you got a 227 by getting 1-2 questions wrong in each subject, then it’s probably luck: in which case, you need to simply keep practicing and on the day of the exam, concentrate as much as humanly possible and home that the scales of luck tip in your favor. ;)</p>