Hey Adrika, In order for you to stand a good chance in getting into a top university abroad, an ideal GRE score of 320+ and 6.5/7.0 in IELTS is recommended. Having said that, a strong letter of recommendation and SOP can help you get in if you have a comparitively low test score. It is also important to crack the interviews that some of these universities conduct. As you can see, a less than ideal score can be compensated with an overall impressive profile. You can also take a look at this blog that gives you a step-by-step guide for applying for MS abroad.