Confusing math problem

[Serhiy Storchaka]

On 22.02.13 11:16, Steven D'Aprano wrote:
> On Fri, 22 Feb 2013 08:23:27 +1100, Chris Angelico wrote:
>> and you can cast out 1's in binary to find out if it's a
>> multiple of 1, too.
>
> O_o
>
> I wanna see the numbers that aren't a multiple of 1.

What "to be a multiple of" means? If A is a multiple of B means A % B == 
0, then 0.5 isn't a multiple of 1.