there is a city..which is full of thieves....john wants to send a ring to mary...but since the city is full of thieves..so he put the ring in a box...and put a lock on it...if he sends this to mary...mary cannot open it since ...
All of you must have solved or at least tried to solve river-crossing or gorge-crossing riddles, with some conditions, but believe me, this one is really typical... There was a group of two teachers (one male and one female) ...
