Xref: utzoo comp.edu:4214 sci.math:16972 sci.misc:4937 ut.general:1523 uw.general:3335 Path: utzoo!utgpu!news-server.csri.toronto.edu!rpi!zaphod.mps.ohio-state.edu!pacific.mps.ohio-state.edu!linac!convex!ewright From: ewright@convex.com (Edward V. Wright) Newsgroups: comp.edu,sci.math,sci.misc,ut.general,uw.general,uw.math.grad,york.general Subject: Re: Subtle Math Questions Message-ID: <1991Apr23.183053.20955@convex.com> Date: 23 Apr 91 18:30:53 GMT References: <2729@ttardis.UUCP> <1991Apr22.165415.9843@contact.uucp> <1991Apr22.235606.10856@ms.uky.edu> Sender: newsadm@convex.com (news access account) Organization: Convex Computer Corporation, Richardson, Tx. Lines: 16 Nntp-Posting-Host: bach.convex.com In article <1991Apr22.235606.10856@ms.uky.edu> ghot@ms.uky.edu (Allan Adler) writes: > >(1) Any positive real number can be represented as an infinite > decimal (e.g.3.14159265358979323846...), possibly ending in > all zeroes or all ones. We teach students how to add decimals. An infinitely long decimal that *ends* in zero or one??? This is a trick question, right? >(5) Galileo gives constructions for regular pentagons and regular > 7-gons somewhere in his collected works. How accurate are his > constructions ? (Yes, look them up. That's where I found them.) I'm not sure how many high-school libraries have the collected works of Galileo.