Interesting Gold Bar Interiew Puzzle
You are a king of an empire. You have a servant working in your palace.
He works all the seven days and you only pay him in the form of gold
bar. You must pay the worker for his work every day at the end of the
If you are only able to make two breaks in the gold bar, how will you pay the servant if the servant works for the equal time every day and thus equal amount must be paid at the end of the day?
Solution:If you are thinking of how to cut in such a way that you are able to make seven equal pieces, you are thinking in the wrong direction. You should give more stress on how to make the transaction with the worker.
When the day 6 ends:
Give Bar B and take back Bar A (You remain with Bar A; Worker possess - Bar B and Bar C)
When the day 7 ends:
Give Bar A (You remain with no bar; Worker possess - Bar A, Bar B and Bar C)
Thus by the end of seven days, you have taken care of everything.
Equilateral Triangle Interview Puzzle
There is an equilateral triangle and three bugs are sitting on the three
corners of the triangle. Each of the bugs picks up a random direction
and starts walking along the edge of the equilateral triangle. What is
the probability that none of the bugs crash into each other?
Solution:If you have come up with the fact that the bugs can avoid the collision only when they decide to move in the same direction be it clockwise or anti clockwise, you have already solved half of it. In any other way, the bugs will definitely run into each other.
Prison Interview Puzzle
Once in a prison with 100 prisoners, the Warden introduces a strange but
interesting challenge to all the prisoners. This challenge can even
grant them the freedom and thus every one of the prisoners becomes quite
The warden selects one prisoner everyday randomly from the lot and moves him into a pitch black room with a bulb and a witch that controls the bulb. The prisoner can carry out three different actions in the room - He can switch on the bulb, switch it off or do nothing and sit idle. A prisoner can be picked up more than one time.
Now the warden introduces the twist in the challenge. He tells them that the prisoners can put a stop to the process any day they feel that every one of them has been confined to that room at least once. If the prisoners are correct, then every single one of them will be set free. But if they have put up a wrong judgment, all of them will be killed.
Seeking it to be the only chance of freedom, the prisoners take up the challenge. They are given some time to discuss regarding it before the process could begin. How will they plan things so that they are finally set free?
Solution:They select one of the prisoner named Jason to do the trick and frame out a full proof plan. According to their plan, whenever a prisoner other than Jason is selected, they will follows some simple steps - If the bulb is off, they will switch it on but if the bulb is already lit, they won't do anything and sit idle.
Cheating Husbands Interview Question
There is a town named Panem. The town is well built and have every
facility available to the citizens. It comprises of 100 married couples.
The husbands of the town are very loyal to their wives but that happens
for a reason. There is a rule that is followed by the people of the
town. If any wife finds out about her husband's infidelity, the husband
is immediately executed.
No woman in the town talks about their own husband and all they do is gossip about others'. Thus every woman in the town is familiar with all the other unfaithful husbands but does not know about their own. This can also be explained as that the husbands remain glued lip about their own unfaithfulness.
One day, the mayor of the town announces to the people that there is at least one cheating husband in the town. What will happen now?
Solution:This one definitely sounds too unusual. But there is an easy way to look at things.
Mind Teasers : Interesting Bet Puzzle
In a bowl, there are several chits with distinct numbers on them. You have to choose any two of them at random.
Will you accept the 2 to 1 bet that the numbers will be relatively prime will you accept it?
If the numbers you pick are 6 and 13, you lose $1.
If the numbers you pick are 5 and 25, you win $2.
The probability of two numbers being relatively
prime is 60%. Thus if you keep playing the bet, you will hypothetically
make 20 cents on every play.
Thus, you should accept the bet.