Hi karthik,
While 'daily' questions can be a useful part of a broader study plan, the overall score results from those individual questions are not nearly as meaningful as CAT results (from FULL-LENGTH CATs) and subject-specific studies (eg. SC quizzes, blocks of Algebra practice, etc.). The GMAT is fairly consistent about the number and type of questions that it asks, including making sure that certain concepts appear on every GMAT. If the accumulated daily questions that you've done don't properly match those ratios/frequencies, then you would likely end up with an inaccurate assessment of your abilities and what you should be focused on going forward.
1) How have you scored on your last FULL-LENGTH CAT (including the Quant and Verbal Scaled Scores)?
2) What is your goal score?
GMAT assassins aren't born, they're made,
Rich