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From: ee163acp@sdcc13.UUCP (DARIN JOHNSON)
Newsgroups: net.puzzle,net.jokes
Subject: Re: Manhole covers (interview question)
Message-ID: <179@sdcc13.UUCP>
Date: Thu, 21-Mar-85 21:21:25 EST
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Posted: Thu Mar 21 21:21:25 1985
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Xref: watmath net.puzzle:638 net.jokes:11500

> > Placed inside a square frame, one side of which is the length of the breadth
> > of the triangle, a Rouloux shaped drill bit can be made to follow the
> > edges of the square.
> > 				Mark Leeper
> 
> Doesn't that produce a "square" with rounded corners?
> Doesn't the drill bit have to be exactly triangular to produce an exact square?

Yes, but that way you get a little bit of bite for those square screws !!!

    Darin Johnson