Number Recreations

Shyam Sunder Gupta
IRSE, FIE, FIPWE,
Former Principal Chief Engineer,
North Western Railway, Jaipur, India-302017
email: guptass@rediffmail.com
http://www.shyamsundergupta.com/

What is New? (Update 12 July, 2023)


Do You Know?

    567 and 854 are the only two numbers m, such that m and m2 contain each of the digits 1 to 9 only once, as shown below:
    5672= 321489, and, 8542= 729316

Can You Find?

CYF NO. 58
Three consecutive even numbers (greater than 26) having the same number of Goldbach Partitions.

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.

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 12th July, 2023.

Copyright 2023-2024 Shyam Sunder Gupta. All rights reserved.