Created on 13th November 2005 EsseEmmeErreSoftwareSolutions.jpg Updated on 21st June 2007

Yesterday, lieing on my bed, while I was thinking about my AMIGA 1200 broken hard disk, my mind was brought away towards matematics, and there I have discovered an interesting thing: think about the number 12 and the resulting number exchanging the two digit positions, that does bring 21, and evaluate the distance between the higher minus the lower, that is 9.
Then think about the number 13 and the resulting digits exchanged number, that is 31 and evaluate the distance between the higher minus the lower, that brings 18, that is two times 9.
Proceeding so on, you will obtain the following table: 
 21-12=9  (9x1)
 31-13=18 (9x2)
 41-14=27 (9x3)
 51-15=36 (9x4)
 61-16=45 (9x5)
 71-17=54 (9x6)
 81-18=63 (9x7)
 91-19=72 (9x8)
It is interesting, it is not?