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        riddles >> hard >> Coin weigh game
        
(Message started by: uzo on Feb 24^th, 2008, 12:39am)

Title: Coin weigh game
Post by uzo on Feb 24^th, 2008, 12:39am

Hello,

I need the solution to the following game. There are 39 coins which need to be weighed on a scale. There is one fake coin which is either heavier or lighter than the other ones. You have only 4 weighs. Any suggestions? Here is the link to the game:

http://www.novelgames.com/flashgames/game.php?id=4

Regards

Title: Re: Coin weigh game
Post by ThudanBlunder on Feb 24^th, 2008, 1:11am

on 02/24/08 at 00:39:40, uzo wrote:

Any suggestions?

Search for relevant previous threads here (http://www.ocf.berkeley.edu/~wwu/cgi-bin/yabb/YaBB.cgi?board=riddles_hard;action=search).

Title: Re: Coin weigh game
Post by uzo on Feb 24^th, 2008, 3:23am

Thank you, but I didn't find any relevant threads.

Title: Re: Coin weigh game
Post by towr on Feb 24^th, 2008, 11:01am

[hide]First: divide the 39 coins in three group, weigh two against each other; if they're equal, the fake coin is in the third group.

Second step: ...

Third step: PROFIT!
[/hide]

Probably more useful:
http://www.ocf.berkeley.edu/~wwu/cgi-bin/yabb/YaBB.cgi?board=riddles_hard;action=display;num=1132320902
http://www.ocf.berkeley.edu/~wwu/cgi-bin/yabb/YaBB.cgi?board=riddles_hard;action=display;num=1050065099