# [bksvol-discuss] Re: Logic Puzzles, Brain Teasers, and Riddles

• From: Rogerbailey81@xxxxxxx
• To: bksvol-discuss@xxxxxxxxxxxxx
• Date: Sun, 17 Aug 2008 22:19:12 EDT
```
Personally, I am really impressed with the sense of humor of these
cannibals. In a message dated 8/17/2008 6:22:40 P.M. Pacific Daylight Time,
jabrown@xxxxxxxxx writes:

I'll  give this a stab.

Let's call the shortest man 1, the middle man 2 and  the tall man 3.

We know that #1 and #2 are not both wearing white hats,  because if they were
then #3 must be wearing a black hat and #3 would know  it (because there are
only 2 white hats).

It then follows that #1  and #2 must be wearing some combination of:
#1 white and #2 black
#1  black and #2 white
#1 black and #2 black

If #2 knows that #1's hat  is white, then #2 knows that his own hat must be
black, because otherwise  it would have been white and #3 would have known
the color of his  hat.
Since #2 didn't know the color of his hat this alternative isn't  possible.

Since the remaining alternatives both have #1 with a black  hat, we now know
the reasoning and the  color.

Cheers,
Jake
----- Original Message -----
From: "Chela  Robles" <cdrobles693@xxxxxxxxx>
To:  <bksvol-discuss@xxxxxxxxxxxxx>
Sent: Sunday, August 17, 2008 8:04  PM
Subject: [bksvol-discuss] Re: Logic Puzzles, Brain Teasers, and  Riddles

> Hello all, I know I'm behind the times with email but  I'm trying to
> catch up, now that I have stable internet connection, I  have a puzzle
> for you all to solve, that is, if any of you can solve  it, my sister,
> Brittnee, is a senior in high school taking algebra 2,  and wanted me
> to help her with this puzzle, however I'm stumped, and  this has been a
> very interesting 24 hours minus sleep time and church,  to think of how
> to solve it, so here it goes.
> Black And White  Hats
> Cannibals ambush a safari in the jungle and capture three men.  The
> cannibals give the men a single chance to escape  uneaten.
>
> The captives are lined up in order of height, and are  tied to stakes.
> The man in the rear can see the backs of his two  friends, the man in
> the middle can see the back the man in front, and  the man in front
> cannot see anyone. The cannibals show the men five  hats. Three of the
> hats are black and two of the hats are  white.
>
> Blindfolds are then placed over each man's eyes and a  hat is placed on
> each man's head. The two hats left over are hidden.  The blindfolds are
> then removed and it is said to the men that if one  of them can guess
> what color hat he is wearing they can all leave  unharmed.
>
> The man in the rear who can see both of his friends'  hats but not his
> own says, "I don't know". The middle man who can see  the hat of the
> man in front, but not his own says, "I don't know". The  front man who
> cannot see ANYBODY'S hat says "I know!"
>
>  How did he know the color of his hat and what color was  it?
>
>
> On 8/12/08, Bob <rwiley@xxxxxxxxxxxxx>  wrote:
>> Hi Jim. The only book I can think of is "are you smarter  than a fifth
>> grader?" that is in the  collection.
>>
>> However, you can check out
>>  http://www.braingle.com./
>> This is a site with all sorts of brain  teasers and puzzles.
>>
>> I especially like the fractured  phrases section. It presents garbled
>> phrases
>> that,  once straightened out, are well known sayings. I used to use this
>>  when
>> teaching folks to cut and paste on the computer. It made a  boring subject
>> more tolerable.
>>
>> Check it  out.
>>
>> Bob
>> ----- Original Message  -----
>> From: <james.homme@xxxxxxxxxxxx>
>> To:  <bksvol-discuss@xxxxxxxxxxxxx>
>> Sent: Tuesday, August 12,  2008 6:52 AM
>> Subject: [bksvol-discuss] Logic Puzzles, Brain  Teasers, and Riddles
>>
>>
>>>
>>>  Hi,
>>> A couple of years ago now, my best friend passed away. His  little girl
>>> really likes this sort of thing. Do we have any  books in the collection
>>> with this kind of stuff, or fun facts  or trivia that might interest
>>> people
>>> who are  somewhere around nine years old? I'd like to read it and have
>>>  fun
>>> with her when I see her. She is so quiet. I never know  what she's
>>> thinking,
>>> and I'd like to help her  if she needs it.
>>>
>>>  Thanks.
>>>
>>> Jim
>>>
>>>  James D Homme, Usability Engineering, Highmark Inc.,
>>>  james.homme@xxxxxxxxxxxx, 412-544-1810
>>>
>>> "The  difference between those who get what they wish for and those  who
>>> don't is action. Therefore, every action you take is a  complete
>>> success,regardless of the results." -- Jerrold  Mundis
>>> Highmark internal only: For usability and  accessibility:
>>>  http://highwire.highmark.com/sites/iwov/hwt093/
>>>
>>>  To unsubscribe from this list send a blank Email to
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>>>
>>>
>>>
>>>
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>>> 6:13  PM
>>>
>>
>>  To unsubscribe from this list  send a blank Email to
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>>
>
>
> --
>  Chela
> E-Mail: cdrobles693@xxxxxxxxx
> CONTACTS!):  cdrobles693@xxxxxxxxxxx
>
> Blog:  http://www.1jtcdr.wordpress.com
> MySpace:  http://www.myspace.com/chelarobles (AGAIN, PLEASE E-MAIL ME
> BEFORE  YOUR REQUEST IS IETHER REJECTED OR ACCEPTED!)
> Skype: jazzytrumpet  (E-Mail ME ABOUT ADDING YOU ONTO MY SKYPE CONTACTS
> BEFORE I GIVE A  CONFIRMATION Of YES OR NO!)
> Mobile Phone: (925) 250-5955 (ONLY FOR  THOSE WHO WORK WITH ME, OR WHO KNOW
> ME)
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>
>
>
> --
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> 5:12  PM
>
>

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