Essentially x0-x, where x is just a digit, not a number, will equal a multiple of 9.
That is sort of it, but going the wrong direction. 10x+x=11x; 11x-(x+x)=9x, by definition a multiple of 9. All other numbers between 10 and 99 are either:
10x+x+y, in which case 11x+y-(x+x+y)=9x, still a multiple of 9, or
10(x+y)+x, in which case 10x+10y+x-(x+x+y)=9x+9y, still a multiple of 9.
Honorbound and honored to be Bonded to Mahtaliel Sedai
Last First in wotmania Chat
Slightly better than chocolate.
Love still can't be coerced.
Please Don't Eat the Newbies!
LoL. Be well, RAFOlk.
Last First in wotmania Chat
Slightly better than chocolate.
Love still can't be coerced.
Please Don't Eat the Newbies!
LoL. Be well, RAFOlk.
Online magic trick: Lady Esmeralda's Crystal Ball
- 27/01/2012 10:27:29 AM
3086 Views
I want to know how it works.
- 27/01/2012 10:48:28 AM
525 Views
I would tell you...
- 27/01/2012 11:02:43 AM
585 Views
No it wouldn't!
- 27/01/2012 11:37:18 AM
531 Views
If you really want to know, here it is.
- 27/01/2012 03:26:37 PM
803 Views
The key, it seems to me, is this:
- 27/01/2012 08:54:23 PM
541 Views
See, I knew someone would be able to do the actual mathematical thing.
- 27/01/2012 09:08:02 PM
577 Views
Math is just another language; the important thing is logic.
- 27/01/2012 09:46:23 PM
699 Views
