Each question lists some members of a group and some things that are NOT members of it.

trivia/groups New

New entry, edited from material collected for the archive and not yet in a released version.

Problem

Each question lists some members of a group and some things that are
NOT members of it.  Given that the spellings of the words themselves
are never involved, how is each group defined?

1. IN: Einstein, Brahms, Freud, Marx
  OUT: Pavlov, Vivaldi, F.D. Roosevelt

2. IN: San Diego, Baton Rouge, Buffalo, Cedar Rapids
  OUT: New York City, Aspen, Boston

3. IN: kleenex, frisbee, scotch tape
  OUT: pancake, golf ball, handkerchief

4. IN: Jefferson, Knox, Hamilton, Randolph
  OUT: Hancock, Franklin, Madison

5. IN: Austria, Canada, Denmark, Japan, Poland, Switzerland
CLOSE: Malta, Peru
  OUT: Argentina, Congo, India, Libya, Sweden

6. IN: Boston, New York, Philadelphia, Cleveland, Richmond,
       Atlanta, Chicago, St. Louis, Minneapolis, Kansas City,
       Dallas, San Francisco
  OUT: ALL OTHERS

Show solution

1. Germans
2. Second-largest cities in their respective states
3. Brand names that have entered into common parlance
4. The four members of Washington's first cabinet
5. Country flags that are solely Red & White
6. Cities with Federal Reserve Bank main branches

-- Mark Nau <nau@agames.com>  (September 1995)

[ Editor: earlier replies by Dan Tilque <xxdant@aol.com> and S.
Jensen <jens@west.net> had between them found all but number 2.  See
also trivia/federal.reserve. ]