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A certain man says that he can weigh any amount from 1 to 40 pounds using only 4 weights. What size must they be?

How a translation of Peano's counterexample to the 'theorem' that a zero Wronskian implies linear dependence can help your differential equations students

An introduction to the prime numbers in many of their aspects.

Title page from the Ars Magna, by Gerolamo Cardano, published in 1545. Engraved portrait of the author. First printed text of algebraic solution of cubic equations.
The story of Gerbert, who became Pope Sylvester II in 999, and his mathematics.
A new history of mathematics text which asks lots of questions about the history and the mathematics.
If you are h feet tall and walk all the way around the Earth, keeping to the same circumference, how much farther has your head gone than your feet when you complete the journey?
Netscape Users
Page 7, Who's That Mathematician: Images from the Paul R. Halmos Photograph Collection: Blackwell, Halmos, Boas, Bollobas, Bombieri, Mumford, Bonsall, Rankin
There are many historical sessions during the 2007 summer meeting of the Mathematical Association of America.