Challenge

Alan Young alansyoungiii at gmail.com
Fri Nov 20 13:18:44 MST 2009


On Fri, Nov 20, 2009 at 13:06, Sasha Pachev <sasha at asksasha.com> wrote:
> If you had a 64 bit number written down in hex, how could you quickly
> tell without the aid of any computational device, including pencil or
> paper if it is divisible by 15?
>
> How about 17?

By 15 do you mean 15 or F?
By 17 do you mean 17 or 11?
-- 
Alan



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