Just puzzled by my wife and thought of checking with you if you
know the answer for this!!!
Situation:
There are 4 persons (A, B, C and D) buried in the sand with their
head out and wearing color cap. A is buried before the wall so A cannot see
anyone and nobody can see A as well.
All they four can see in one direction. In the same way,
B cannot see anyone
C can see only B
D can see only B and C.
They only clue they have is, in the four caps two is in red
and other two is in black color.
Rule:
Anyone should say color of their cap correctly, if any said
it wrongly all of them will get killed.
They cannot discuss with each other.
One of them mentioned the color of the cap correctly and all
of them survived
Who said the color of the cap correctly?
