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www.mathproblems.info |
Mike Shackleford's math pages. I've done the first 106 problems, so feel free
to send me comments |
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http://www.qbyte.org/puzzles/ |
Nick's Puzzle pages. This is another well-constructed site with a variety of puzzles with solutions. |
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physics.nist.gov/cuu/Units/current.html |
Definitions of the SI base units (essentially all units of measurement are
defined relative to these units). |
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physics.nist.gov/Pubs/SP811/appenB.html |
This is the only repository of conversion factors for units of measurement that
I have ever found, which is both
comprehensive and accurate. Basically, they know which conversions are exact and
they know which units have inconsistent definitions, and they don't introduce
rounding error without telling you. Do not go to www.nist.gov for this info!
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