Hello There
Looking at the 2012 class profile at Columbia the students scored in the range of 680-760 in their GMAT. Wharton’s MBA class of 2012 the students scored in the range of 650-770 in their GMAT and the median GMAT score being 720. Similarly looking at the 2012 class profile at Harvard the students scored in the range of 550-790 in their GMAT and the median GMAT score was 730.
Hence a GMAT score of 700 plus is advisable if you are aiming for top institutes abroad.
However GMAT alone won’t determine your chances of admission; beyond the academics will also help you in determining your candidature and your work experience plays a vital role as well.
Beyond academics plays an equally important role so make sure you showcase it well. Generally most of the applicants have a good 4-5 years of work experience. Although it is not just the work experience that counts but also what you did there like-what were your achievements, what initiative you took, what changes you drove in your workplace etc. So to leverage this if you can show that in 4 years you have demonstrated the skills business schools are looking for you could put in a strong set of essays. Hence the quality of your work, your academics and beyond academics will play an important role in determining your candidature.