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Byline: Gunter M. Ziegler (1), Ravi Vakil (2) Abstract: This column is a place for those bits of contagious mathematics that travel from person to person in the community, because they are so elegant, surprising, or appealing that one has an urge to pass them on. Contributions are most welcome. Author Affiliation: (1) Institute of Mathematics, MA 6-2, TU Berlin, D-10623, Berlin, Germany (2) Department of Mathematics, Stanford University, Bldg. 380, 94305-2125, Stanford, CA, USA Article History: Registration Date: 06/11/2008

Byline: Ravi Vakil (1) Abstract: This column is a place for those bits of contagious mathematics that travel from person to person in the community, because they are so elegant, suprising, or appealing that one has an urge to pass them on. Contributions are most welcome. Author Affiliation: (1) Stanford University, Department of Mathematics, Bldg. 380, 94305-2125, Stanford, CA, USA Article History: Registration Date: 07/11/2008

A comparative study of drunken people is conducted mathematically. The keg index and a mathematical theorem explaining drunkenness are discussed.

A number, like four, can be called Fortuitous if it is equal to the product of the lengths of the words in its name. It is sated that such type of numbers can be easily found.

Byline: Ravi Vakil (1), Sam Vandervelde (2) Author Affiliation: (1) Stanford University, Department of Mathematics, Bldg. 380, 94305-2125, Stanford, CA, USA (2) Department of Mathematics, CS & Statistics St. Lawrence University, 23 Ramada Drive, 13617, Canton, NY Article History: Registration Date: 07/11/2008

The answer to a mathematical puzzle, published in the volume 27, number 3, of the journal "Mathematical Entertainments," is provided.

Presents a crossword puzzle in mathematics.