Number Recreations

Shyam Sunder Gupta
Principal Chief Engineer,
North Western Railway,
Jaipur, India-302017
Telephone: (0141) 2725871(O)
email: guptass@rediffmail.com
http://www.shyamsundergupta.com/

What is New? (Update 30 October, 2016)

CYF NO. 47 Solution by Bernard Fischel and Brian Trial given.

CYF NO. 47 Comments by Selvam Chidambaram given.

CYF NO. 41 Comments by K D Bajpai given.

Prime curios 5, 853, 13579, 35333, 49019, 95063, 630745, 630745, 1110181, 1120573, 1180811, 1230127, 1440689, 2275327,2770513, 9040861, 14001019, 66410849, 101838101, 188303881, 396808693, 665067264, 968606869, 1023567948, 1124396857, 1124638579, 1124685973, 2547863419, 6650672647, 10123456897, 10123465789, 10124389567, 10125984763, 23457987601, 581321345589144233, 10591...10631(26 digit), 98761...13853(28 digit), 13171...17379 (34 digit), 17101...80291 (108 digit), 11111...11111 (109297 digit) and 11111...11111 (270343 digit) added.


Do You Know?

1/37 = 0.027027 027 ...
1/27 = 0.037037 037 ...

Can You Find?

CYF NO. 48
Five consecutive odd numbers which are primes or strong pseudoprimes(base-2).

email your answer

Contents

Note: The above topics including many more will be added in due course.

 


My Contributions in Prime Curios

Prime Curios! - site maintained by G. L. Honaker Jr. and Chris Caldwell


My Favorite Links

  • Magic Squares,Magic Stars and Other Interesting number patterns by Harvey Heinz
  • Mudd Math Fun Facts pages
  • On-Line Encyclopedia of Integer Sequences OEIS
  • Math Puzzles
    An interesting site with lot of math recreations by Ed Pegg Jr.
  • World of Trotter Math
    Fascinating work on Number and other math recreations by dedicated mathematics teacher Terry Trotter.

My Favorite Books

Recommended list of books for those interested in Recreational and Computational Number theory
In Association with Amazon.com In Association with Amazon.in


The Rail
(January, 2003)

(March, 2003)
The Busy Educator Award
(October, 2003)

Send me e-mail at guptass@rediffmail.com

This page was last updated on 30th October, 2016.

Copyright 2001-2016 Shyam Sunder Gupta. All rights reserved.