Hey Radman, have you any more of these conundrums ?
Not as good as this one. I think we will soon hear @flyboy's hand slapping his forehead when the krugerrand drops.
The novel that reminded me of the puzzle twists your mind even more;
A man knows his wife is cheating on him. He follows her and her lover to an hotel intending to catch them in flagrante delicto
. He is unsure exactly which room they have gone into, it could be 401, 402, or 403. At random he picks room 401. Just as he is about to kick in the door a family come out of room 403. Waiting until the family has left he realises he now has a much better chance if he changes in mind and kicks in door 402 which he does revelaing the cheating couple.
Of course he might still have got it wrong but the odds were 2:3 they were in 402.