On Fri, Nov 20, 2009 at 1:06 PM, Sasha Pachev <sa...@asksasha.com> wrote:
I just came up with this while teaching my son about numbers. Let's see how quickly somebody figures this out.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?
THIS is what you teach your son about numbers? ROFL. PLEASE tell me your son is older than 4!
smime.p7s
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