[wellylug] OT - how the hell does this work?

[David Antliff]

On Wed, 2 Feb 2005, Jamie Dobbs wrote:

> It doesn't, well not always - it got it wrong twice for me.

(10 * x + y) - (x + y) = 10x + y - x -y
                        = 9x

All multiples of 9 (except zero) have the same symbol (bell), so yes it 
always works for two-digit numbers greater than zero. I hate to say it, 
but the error lies with you :)


-- 
David.