A3- Henceforth, with the 700+ marks obtained, students miss 15-21 difficult problems and concentrate on the remaining questions. If they are stuck on an issue, they don't invest too much time in it and proceed with the exam. Likewise, one can skip 15-21 questions in the Quant portion and still achieve well on the GMAT. Hence, to get a better score, work on increasing your strengths and solving more challenging puzzles.