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What Are Your Favorite BrainDen Puzzles


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Are you new to BrainDen and you want to see the best brain teasers? There are thousands of puzzles and riddles here. This thread is a place where you can post your 3 most favorite puzzles published on this site. You can add a short reason why you like them too.

All great puzzles deserve due attention. Don't let great puzzles posted a year ago be unnoticed. Let me start with my favorites.

Hats On A Death Row - simple conditions yet so hard and can be solved without deep knowledge of math (over 500,000 views)

Honestants and Swindlecants III - great example of logic operations

Weighing Puzzle IV - I read this puzzle in year 2002 (I think) and it was one of the reasons to start this whole site smile.gif

Post links to 3 puzzles that you consider the best. And remember, solution is already posted - DO NOT resurrect these old threads.

Enjoy BD wink.gif

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If you like word riddles, just look for any riddle by shakeepuddn to find a pearl.

If you're not already familiar with his style, here's one that's not too difficult (at least by his standards) to give you a taste of it.

The honestant / swindlecant / randomcant that had me pulling my hair out.

A "hats" problem that blew just about everyone's mind.

Edited by plasmid
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The reason reason I joined Brainden.com.. to share   " Lethal solution"  and  "Unanswered". My favorites even those are  my  OPs.

#1 Lethal Solution
 
On top of a digital weighing scale
are four identical glasses, filled with
water, weighs A grams each. Then,
somehow the poison X was sneaked
into one of them with no change in
color, odor  or volume.
 
  \     /    \      /     \      /   \      /
   \__/      \__/       \__/      \__/
==========================
               [4 A + x ]
 
Using the scale once.Can you find out
which of the glasses is poisoned?
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