How to solve "Jewish" math problems

Back in the seventies, the mathematics department at the Soviet Union's Moscow State University (one of the most prestigious departments in the USSR at the time) used a special collection of math problems, informally referred to as "Jewish" problems or "coffins" ("coffin" problems translating roughly to "killer" problems in… » 10/11/11 1:20pm 10/11/11 1:20pm