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This is a collection of plates that Leonardo da Vinci created to illustrate De divina proportione of Luca Pacioli.
A boy gives 11 coins of equal denomination to a man, and the man finds that their total value in yen is 4 less than his age.
Now there are three sisters who leave home together.
A set of four posters dealing with the Pythagorean Theorem, infinity, prime numbers, and the history of pi.
A reprint of the 32nd yearbook of the NCTM, dealing with developments in mathematics education in the U.S. and Canada. In particular, it gives a history of the various reform movements up to the publication date of 1980.
Two men have a certain amount of money. The first says to the second, "If you give me 5 denari, I will have 7 times what you have left."
A brief outline of policies for submission of articles to Loci.
A history of the various algebraic structures that came together to give us "abstract algebra" by early in the twentieth century.
What proportions of sugar at 8 cents, 10 cents and 14 cents per pound, will compose a mixture worth 12 cents per pound?
There is a log 18 feet long, the diameter of the extremities being 1 ft and 2.6 ft respectively...