Article date: Jun 1961
Article title: A new collection of "brain teasers"
Mathematical Games column? Y
Book: 3. New Mathematical Diversions from Scientific American
Chapter: 19. Nine More Problems
This data confirmed? yes
Notes
Peter Rowlett (27 August 2022):
Peter Rowlett initial guess (Uncertain)
Peter Rowlett (28 October 2023):
I have seen this chapter and column side-by-side and they match.