Find the logic beyond the summands in the above equation and derive the values of n and Sn .
'Multiply each 2 digit integer by its reverse. Omit terms {1,2,90}.'
So, Sn is 248743, and n=87.
blackjack
<a href="http://c.casalemedia.com/c?s=51816&f=3&id=0" target="_blank"><img src="http://as.casalemedia.com/s?s=51816&u=http://perplexus.info&f=3&id=0&if=0" width="120" height="600" border="0"></a>
flooble's webmaster puzzle
Solution
