tripathimani wrote:Hi,

What are the sources for tougher problems ? I have observed that there is lack of 650+ level problems. I''m having a hard time pushing my scores from high 500 levels to high 600 levels. Once they start hitting me with tougher problems, under timing pressures I'm not able to handle them.

Few resources I'm aware of -

1. Kaplan 800
2. Difficult Quant Problems - BTG
3. OG

Thanks

A few other sources that I can suggest is MGMAT (see if you can buy their challenge problems set, they are pretty good and were mostly of the 700+ level), Veritas (I have personally not used them so cant comment a lot, but they are one of the leading providers of GMAT related services) and the internet . Also just practicing these problems wont take you far, spend more time in making sure that you are absolutely clear with your basics, this should help you deal with the questions that they throw at you during the real thing.