A beautiful princess in a far away kingdom wanted to marry a peasant boy.
The king was against the marriage and suggested the decision be left to chance.
The three of them were standing in the courtyard, which was covered in numerous black and white pebbles.
The king claimed he'd picked up one white and one black pebble and put them into a bag.
The peasant boy had to remove one pebble - if it were white he could marry the princess, if it were black he'd have to leave and never see the princess again.
The peasant boy was poor, but not stupid. He noticed that the king, by sleight of hand, had put two black pebbles into the bag.
How did the peasant boy resolve his predicament without accusing the king of cheating?