There is a man looking at someone's picture and says:
Brothers and Sisters I have none,
but this man's father is my father's son.
Whose picture is the man looking at?
(In reply to answer
by K Sengupta)
Let us call the individual looking at the picture as V, and V is looking at X's picture (say).
Since V is a male, who does not have any brothers or sisters, it follows that V's father's son must be V himself.
Accordingly, in terms of the third line, it now follows that X is a male and X's father is V.
Therefore, X is the son of V, and consequently, the man is looking at the picture of his son.
Edited on May 21, 2008, 2:29 pm