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This is a normal post Finding strange patterns was good and the more complex rules you found could be simplified
This was before I was introduced to algebraic equations etc as a means to simplify things.

One of my favourite maths facts is that if you take ANY number I can tell you if it's divisble by 9 in the time it takes to add together all the digits in it until you end up with a single digit.

eg 892857048728481 = you can remove (skip) 9's as you go also, so you add 8, skip 9, 2, 8 (= 18 so reset to 0) 5, 7, 4, 8, (skip 7, 2), 8, 4, (= 36 so reset to 0), 8, 1 = 9.

That's advanced. If you just add all digits you get 81 then add those you get 9.
So it's divisible by 9.
 (I helped save b3ta! Professor Fnord Regius Professor of B3ta Chronology, Sun 31 May 2009, 10:01, , Reply)
This is a normal post Ok, I'm scared, you're too smart for me......
*Hides in the corner* :-D
 (Stashie is plotting against his blender on, Sun 31 May 2009, 10:11, , Reply)
This is a normal post This is all part of the front ;)
Now you can wow the sexy geeky chics in glasses and whisper sweet dewey decimals in their ears. Very simple things in the right context look like magic tricks.
 (I helped save b3ta! Professor Fnord Regius Professor of B3ta Chronology, Sun 31 May 2009, 10:17, , Reply)
This is a normal post dewey decimals?
Isn't that a system for organising books?!
 (I helped save b3ta! more balanced than jeremy beadle It wasn't me..., Sun 31 May 2009, 10:43, , Reply)
This is a normal post Yeah. :)
works on Librarians too
 (I helped save b3ta! Professor Fnord Regius Professor of B3ta Chronology, Sun 31 May 2009, 12:34, , Reply)