The Diamond box brain teaser
A man is on the bank of a river. He has a small box, a chain, a lock (like a masterlock), the key to that lock, and a diamond. He wants to get the diamond to a woman who is on the other side of the river.
She has an identical box to the man, a chain, a lock, and the key to that lock. (Note: each key opens only it’s respective lock and the locks are not the same.) The river is too big to swim across and the boxes do not float.
The only way to get the diamond across the river is put it on the ferry, which will only carry cargo. However, neither person trusts the ferry driver, so in order to send anything across the river, it must be in a locked box. (ex: They can not just send the key across.) Also, anytime a box is sent across it must be locked even if the box is empty.
Without killing the ferry driver, how does the man get the diamond to the woman?
The man will put the diamond in the box and lock it. When Woman will get the box she will locket with her own chain and lock she will give the box to the ferry man than the first one will receive the box and opened his lock .he will send the box back to the woman the woman will open her Lock.
Your Answer
More puzzles to try-
What made her suspicious of that man?
A girl was sitting in her hotel room when she heard a knock on the door. She opened the door ...Read More »Changing color balls puzzle
Kevin, Charles, Larry and Alex are in a room that’s about 110 feet long. In front of them are 5 ...Read More »Alternating T-shirt colors
Ten friends walk into a room where each one of them receives a hat. On each hat is written a ...Read More »Around a House riddle
What runs around a house but does not move?Read More »Funny Decipher Riddle
Can you decipher the logic used for below equation? 2 + 2 = fish 3 + 3 = eight 7 ...Read More »Chasing dogs puzzle
There are four dogs each at the corner of a unit square. Each of the dogs starts chasing the dog ...Read More »Which do you light first?
You are in a dark room and want to see what is inside it. With you are a match, a ...Read More »26-63=1
Can you make the equation correct by adding just one symbolRead More »Dirty Martini and Barman
A man walked into a pub and went straight towards the Barman. He asked for a dirty martini from the ...Read More »At what time does it happens puzzle
Sometime during every hour the minute hand lies directly above the hour hand. At what time between 4 and 5 ...Read More »Find the Lost Boot in the Shearing Salon
The ultimate seek-and-find challenge! Can you unearth the hidden boot amongst the sheep in our shearing salon? Put your skills ...Read More »THE BOY OR GIRL PARADOX
Imagine that a family has two children, one of whom we know to be a boy. What then is the ...Read More »Three Wives & Their Jealous Husbands
Three jealous husbands with their wives, having to cross a river, find a boat without a boatman. But the boat ...Read More »Surviving Struggle Puzzle
Once upon a time, three rivals got together in a dark wood on an open spot to compose a quarrel ...Read More »In the Rain but hair didn’t wet puzzle
Jim and his mum and dad went out in the rain on their holiday but only two of them got ...Read More »Can fly but not a bird riddle
He can not see yet he know you are there. He is not a cow but he is leather. He ...Read More »Tennis Player
Why weren’t the tennis players allowed in the restaurant? Why weren’t the tennis players allowed in the restaurant? Why were ...Read More »This impossible triangle seems to twist in three dimensions.
This impossible triangle seems to twist in three dimensions.Read More »The thief
Everyday a biker would carry a bag of sand through a border with a different bike. A policeman would see ...Read More »Time two hundred years riddle
A man goes upstairs to grab his time machine. He walks downstairs then goes back in time two hundred years. ...Read More »
