
Shyam Sunder Gupta
Chief Bridge Engineer
North Western Railway
Jaipur, India
Telephone: (0141) 2220535(O), 2810808(R)
email: guptass@rediffmail.com
http://www.shyamsundergupta.com/
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Happy New Year 2008 What is New? (Update 30th December, 2007) CYF NO. 36 solutions by Luke Pebody , Bruno Mishutka given. Integer Sequences
A131306,A131316,A131535-A131552,A131604-A131606,A131609, The page on Cab Numbers added. CYF NO. 35 solutions by Jaroslaw Wroblewski , Fred Schneider, Donovan Johnson given. CYF NO. 34 comments by Brian Trial, Nathan Gilbert given. CYF NO. 33 solutions by Jens Kruse Andersen, Donovan Johnson, Carlos Rivera, Jacques Bernard, Nathan Gilbert, Gaurav Singh given. Prime
curios
4,17,1687,3283,91596...16721 (52-digits),23456...56789 (62-digits),78912...67891 (355-digits), |
Do You Know?The Golden Ratio (Phi=1.61803...) can be expressed using four 4's as (√ 4 + √ (4!-4) )/4. |
Can You Find?CYF NO. 37 Smallest set of composite numbers x and y such thats(x²)=s(y²) where s(x²)and s(y²) denote the sum of aliquot divisors of x² and y² respectively. email your answer |
Contents
Note: The above topics including many more will be added in due course.
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My Contributions in Prime CuriosPrime Curios! - site maintained by G. L. Honaker Jr. and Chris Caldwell
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This page was last updated on 30th December, 2007.
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