Posted by PS on April 17, 2003 at 03:49:55:
In Reply to: Gotta check this website out posted by rhino on April 16, 2003 at 09:19:24:
: check out the site
I figured it out. Cute.
These are the only answers you can get--multiples of 9.
9 18 27 36 45 54 63 72 81
Though the signs change, these numbers always have like signs that match each other.