You are in a room with two doors and 2 doors only, no windows e.t.c. At the two doors are some big - muscly guards - one always lies, and one always tells the truth, you do not know which is which. One door leads to freedom, and one door leads to a lion cage, you do not know which is which. You have one question which can be only asked to one guard ( you do not know which one is truthful and which one is a liar). If this question gives you the answer (without you having to guess the door) then you are free. Think of what both guards will say and how you will get the they will respond. for example if you ask them which is the door to freedom, the truthful one will point to the door to freedom ,and the liar will point to the lions cage,, so that doesnt work. Thats one down!!!
Appreciated alot, from MEE
Appreciated alot, from MEE