Inference Answer
This problem can be solved by speculating what others would speculate.
If both A and B had a red ball behind him, C would instantly
report that he has a black ball behind him.
If only A had a red ball behind him, B would know soon that he has
a black ball, because if he didn't, C would instantly report that he
has a black ball behind him.
Because nobody reports anything, everyone must have a black ball.
Statistics and Hall of Fame
Between 1996-05-21 and 1996-08-06 the page was fetched 158 times.
Approvable answers were received from the following persons:
- Adlai Waksman
- James Hoenig
- Denis Borris
- Remi Borris
- Kara Beauchamp
- Hannu Napari
- Kevin Elias
- Jonell Mackay
- Eero Taipale
- Matthew Patron
- Markku Räsänen
Sorry if I missed someone, it's not intentional.
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