Mathew with your score and percentile in MAT below is the list of colleges in which you have a good probability of getting a call on applying:

• Indian Institute of Finance, Greater Noida
• AIMS Institutes, Bangalore
• Bhartiya Vidya Bhavan Institute of Management Science, Kolkata
• Bhavan’s Priyamvada Birla Institute of Management, Mysore
• Bharatiya Vidya Bhavan's Usha and Lakshmi Mittal Institute of Management, New Delhi
• Entrepreneurship and Management Processes International, New Delhi
• FLAME University, Pune
• GL Bajaj Institute of Management and Research, Greater Noida
• Institute of Finance and International Management, Bangalore
• Amrita Vishwa Vidyapeetham University, Coimbatore

Still, the colleges I have mentioned above are only on the basis of your percentile. But you know that percentile is not the only factor to get a call from any college. If you mention me your academic records i.e. 10th, 12th and graduation percentage with branch and stream along with work experience then I might be able to predict the college more accurately from where you can get a call in a much better way.

To further know about the colleges in which you have a good chance to get a call with a score of 640 in MAT, check out Careers 360 pathfinder tool - https://bschool.careers360.com/pathfinder/mat?icn=mat-path&ici=cahometool_lp

All the best!!