Shreyas: remainder of (1993^1993)/13
The answer is 4.
I got the answer from this free online calculator. (I am not sure it the web2.0calc will do this or not - I don't think that it will)
http://www.wolframalpha.com/input/?i=mod%281993%5E1993%2C13%29
131226 mod question.JPG
+118653 
