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- Newsgroups: rec.puzzles
- Path: sparky!uunet!cs.utexas.edu!wotan.compaq.com!twisto.eng.hou.compaq.com!solo.eng.hou.compaq.com!costley
- From: costley@solo.eng.hou.compaq.com (Brett Costley)
- Subject: Re: the irrational stamp puzzle
- Message-ID: <1993Jan21.171610.23855@twisto.eng.hou.compaq.com>
- Sender: news@twisto.eng.hou.compaq.com (Netnews Account)
- Organization: Compaq Computer Corp.
- References: <2338@sjfc.UUCP> <C16D12.CM@cantua.canterbury.ac.nz>
- Date: Thu, 21 Jan 1993 17:16:10 GMT
- Lines: 14
-
- >In article <2338@sjfc.UUCP>, dmc@sjfc.UUCP (Cass Dan) writes:
- >|>
- >|> You have an ink stamp which is so amazingly precise that, when inked
- >|> and pressed down on the plane, it makes every circle of irrational
- >|> radius (centered at the center of the stamp) black.
- >|>
- >|> Question: Can one use the stamp three times and make every point
- >|> in the plane black? [assume plane was white to begin with, and
- >|> ignore the fact that no such stamp is physically possible]
-
- You can do it in one stamp. Put the stamp down and then without lifting
- it move it around sufficiently to cover the entire area.
-
- Or, stamp once and use your finger to smear the ink before it dries. :)
-