reasoning Maths Puzzle Logical Reasoning Direction Sense

you want to go to a city where everybody always says the truth, on your way there you reach a crossroad on one side is the city where everyone says the truth, on the other is a city where everyone lies. There is a man at the cross road that comes from one of the city's, you do not know from which city the man comes from and you can only ask him one question to find out where the city of truth is what do you ask him?

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I will ask the man "If i ask some person who is coming from other way where truth city is what will he reply??"
There are two possibilities:
1.The man at the cross road is from Truth city he will point to other city(False)
2.The man at the cross road is from False he will point to same city(As other city is truth city and he is lying)
Therefore,Whichever way he comes he will always point to false city..Hence,other city is Truth city
8 years agoHelpfull: Yes(2) No(0)

reasoning Other Question

There are 2 rooms one with gold treasury and another with deadly snakes. Each room is guarded by a security.Among the two one always speaks truth and the other false.You can ask only one question to either of the security to identify the room with gold.
a man needs to go through a train tunnel. he starts through the tunnel and when he gets 1/4 the way through the tunnel, he hears the train whistle behind him. you don't know how far away the train is, or how fast it is going, (or how fast he is going). all you know is that
if the man turns around and runs back the way he came, he will just barely make it out of the tunnel alive before the train hits him.
if the man keeps running through the tunnel, he will also just barely make it out of the tunnel alive before the train hits him.
assume the man runs the same speed whether he goes back to the start or continues on through the tunnel. also assume that he accelerates to his top speed instantaneously. assume the train misses him by an infintisimal amount and all those other reasonable assumptions that go along with puzzles like this so that some wanker doesn't say the problem isn't well defined.
how fast is the train going compared to the man?