Abstract gift for Bill Gates

The Microsoft founder and philanthropist is turning 55 this week and since his age coincides with the rightmost two digits of his birth year, it's particularly special — mathematically, that is.
By Aziz S. Inan
Special to The Seattle Times

Bill Gates was born in 1955 and, this week, on Oct. 28, the Microsoft chairman and philanthropist will turn 55, a distinct age because it coincides with the rightmost two digits of his birth year.