It is all about interview puzzles and HR questions .

Saturday, 31 March 2018

Two doors-heaven and hell

Puzzle :-

You are standing before two doors.
One of the path leads to heaven and the other one leads to hell.
There are two guards standing one by each door.
You know one of them always tells the truth and the other always lies, but you don't know who is the honest one and who is the liar.
You can only ask one question to one of them in order to find way to heaven.
What will you ask in order to determine which door leads to heaven?

Hint : -
Try to ask a question in which both the gate keepers will give you same answer.

Answer :-

Ask one of the guard,
" what would be the other guard say if a ask him which way is the hell?  "

And whatever answer he gives that is the way to heaven.

Explanation :-
1.
If you end up asking the question to the truthful one, he will tell the truth and he knows the other guard is going to lie(truth (i.e. other guard will tell the way to heaven when asked for way to hell) so truth will show the way to heaven.
2.
If you end up asking the question to the liar he will lie and he knows the other guard is going to tell truth (i.e.
Other guard will tell the way to hell)
So liar guard will show the way to heaven. 

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