Shyam Sunder Gupta
Principal Chief Engineer,
Southern Railway,
Chennai, India600003
Telephone: (044) 25353030(O)
email: guptass@rediffmail.com
http://www.shyamsundergupta.com/
What is New? (Update 4 November, 2015) The page on Fascinating Triangular Numbers updated and enlarged. CYF NO. 46 results by Al Zimmermann and Brian Trial given. CYF NO. 41 results by Brian Trial and Shyam Sunder Gupta given. 
Do You Know?There can not be four triangular numbers in arithmetical progression. 
Can You Find?CYF NO. 47 Five even or five odd distinct positive integers such that the sum of any pair of numbers is a perfect square.email your answer 
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Note: The above topics including many more will be added in due course.

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This page was last updated on 4th November, 2015.
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