A moderator takes a set of 8 stamps, 4 red and 4 green, known to three logicians, and affixes two to the forehead of each logician so that each logician can see all the other stamps except those two in the moderator's pocket and the two on his or her own head. He asks them in turn if they know the colors of their own stamps:
1. A: "No"
2. B: "No"
3. C: "No"
4. A: "No"
5. B: "Yes"

What are the colors of B's stamps?

"What are the colors of B's stamps?"

This question should be changed to:
"What is the color of each of B's stamps"

Because it's quite obvious that B has 2 stamps of different colors due to the fact that the colorS of the stamps were wanted.

Regards, Bruno.

Posted by Bruno on 2004-12-09 03:08:17