Answers

2014-10-29T19:46:05+08:00
Srinivasa Ramanujan... :) 
not really sure 'bout the spelling :)
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2014-10-30T11:32:41+08:00
For me its either

archimedes is considered as the greatest mathematician of all time.
or isaac newton who is famous in making the theories of gravity, his law of motion, and his expirement with prism. And the most well known that he has done is that because of him calculus is our subject today, for he is the one who made it
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