10 May 2011
Proof of why a transposition error is always divisible by 9
Here's a little proof I knocked up over the weekend. Sorry it's in a picture format, the platform on which this blog is based can't deal with simple mathematical symbols, so I had to convert a document into a couple of pictures. If you click on the pictures, you should be able to see a larger version of each of the two pages of the proof.
Subscribe to:
Post Comments (Atom)
Please note, there is a deliberate error in here, so if you copy it verbatim it won't be watertight. If you want to correct it, you first have understand the error. ;-)
ReplyDeleteDo you know who first made this known or who discovered the transposition error rule of divisible by 9?
ReplyDeleteSorry, no idea on that one. It just seems to be "one of those things."
ReplyDeleteSorry, but this formula is a waste of space. The proof can be shown in two lines with four numbers
ReplyDelete