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        riddles >> microsoft >> Four dogs puzzle
        
(Message started by: BenVitale on Feb 4^th, 2008, 11:26am)

Title: Four dogs puzzle
Post by BenVitale on Feb 4^th, 2008, 11:26am

I found the following puzzle on another website:

There are four dogs, each at the counter of a large square. Each of the dogs begins chasing the dog clockwise from it. All of the dogs run at the same speed. All continously adjust their direction so that they are always heading straight towards their clockwise neighbor.

How long does it take for the dogs to catch each other? Where does this happen?

(Hint: Dog’s are moving in a symmetrical fashion, not along the edges of the square).

Title: Re: Four dogs puzzle
Post by towr on Feb 4^th, 2008, 11:44am

This seems equivalent to the problem of heat seeking missiles (http://www.ocf.berkeley.edu/~wwu/cgi-bin/yabb/YaBB.cgi?board=riddles_hard;action=display;num=1142629557)

Title: Re: Four dogs puzzle
Post by BenVitale on Feb 4^th, 2008, 1:11pm

Thanks for the link.