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- Path: sparky!uunet!usc!chaph.usc.edu!aludra.usc.edu!not-for-mail
- From: rmurphy@usc.edu (Bob Murphy)
- Newsgroups: sci.math
- Subject: arithmetic refresher
- Date: 12 Dec 1992 19:44:19 -0800
- Organization: University of Southern California, Los Angeles, CA
- Lines: 21
- Sender: rmurphy@aludra.usc.edu
- Distribution: world
- Message-ID: <1gebijINNikr@aludra.usc.edu>
- NNTP-Posting-Host: aludra.usc.edu
-
-
- I just saw a Dover book entitled "Arithmetic Refresher" by A.A. Klaf.
- While skimming through the book I came upon the ridiculous question #530.
-
- Q530 What is the procedure for squaring the mean of two numbers?
-
- The answer is to multiply the two numbers and then add the square of
- half the difference.
-
- Well it's simple algebra to see that this is true but what a stupid
- approach! Why not just take the mean of the two numbers and then
- square the result? I'm sure that books like this are sold mostly
- to those whose math skills are poor. Maybe this is one reason that
- they would find math to be just a bunch of cryptic formulas
- that one has to memorize.
-
- Bob Murphy (rmurphy@aludra.usc.edu)
-
- p.s. The author also has written a calculus refresher but I didn't
- have time to look through it.
-
-