I agree with everything said here except the last two lines:One does not have a 1 to carry-over from a previous column so the second last line should be reading as:
9+5=14 = 5 mod 10
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
re: could be...
