>Hmm.  I'm 41, learned to use a slide rule in high school, and learned "5 or
>more; round up"

Me too, on all three items :-).

However, when I got to chemistry class the teacher took extra care to teach
us the slightly more accurate way of rounding (odd/even).

Found this nice web tutorial on significant figures and rounding by, Stephen
L. Morgan, Professor, Department of Chemistry & Biochemistry, The University
of South Carolina.
http://www.chem.sc.edu/faculty/morgan/sigfigs/index.html


Paul

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