Logic puzzles

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M Gregg

M Gregg

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Joined 2010
#1
Easy one first,

Two guards guarding two doors, one is the door to freedom the other is to Hell.
One guard always lies the other always tells the truth, however you don't know which guard is which. The doors both look the same.

You can ask one question and know which door is which, what is the question?


Regards
M. Gregg
 
#2
Ask a guard what ithe other guard will say is behind the questioned guard's door.

Hell boy will say that heaven boy will say the hell boy is guarding heaven (ie heaven boy's door "hell"). Heaven boy will say that hell boy will say that heaven boy is guarding hell So if you want freedom go to "hell"

dave
 
#3
Yes correct!🙂

Next,

A man needs to cross a river, he has a boat.

He needs to get a LION, PIG, and potato across the river.

When he is with them they are OK, however if the lion is left with the pig it will eat it, If the pig is left with the potato then it will eat it.

How does the man get all three across the river?

Regards
M. Gregg
 
#7
Chuck the potato across the river, the pig will see it and being clever, swim over to eat it. However, pigs are slow swimmers, so you can row the lion across by boat and pick up the potato before the pig gets there. 😉
 
#11
Take the pig across first and leave it there, go back and get the lion, drop the lion off and take the pig back to the original side agian and drop it off, take the potato over and leave with the lion, then go back and bring the pig agian.

Mike
 
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#15
Do you know this without cheating?

If a bear walks one mile south, turns left and walks one mile to the east and then turns left again and walks one mile north and arrives at its original position, what is the color of the bear?


Regards
M. Gregg
 
#19
Again without cheating..


U2 has a concert that starts in 17 minutes and they must all cross a bridge to get there. All four men begin on the same side of the bridge. You must help them across to the other side. It is night. There is one flashlight. A maximum of two people can cross at one time. Any party who crosses, either 1 or 2 people, must have the flashlight with them. The flashlight must be walked back and forth, it cannot be thrown, etc. Each band member walks at a different speed. A pair must walk together at the rate of the slower man's pace:
  • Bono: - 1 minute to cross
  • Edge: - 2 minutes to cross
  • Adam: - 5 minutes to cross
  • Larry: - 10 minutes to cross
For example: if Bono and Larry walk across first, 10 minutes have elapsed when they get to the other side of the bridge. If Larry then returns with the flashlight, a total of 20 minutes have passed and you have failed the mission.

Regards
M. Gregg
 
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