BRAIN TEASERS

1. Assume there is a room with three light bulbs in it.  Outside the room is a light switch with 3 switches on it labeled A, B, and C.  Once you enter the room, you will no longer be able to access the switches.  How can you, upon entering the room, tell me which of the three switches controls each of the light bulbs?


2. There is a river.  You start on one side with a wolf, a pig, and a carrot.  There is a raft which you can use to cross the river.  Unfortunately, the raft is too small to hold more than 2 things (you being one of them) at a time.  You need to get yourself and all three of the others to the opposite side to continue your journey.  Unfortunately, without you present, the pig will eat the carrot and the wolf will eat the pig.  How do you get all 3 to the other side?

Make sure you exhaust grinding your brain before scrolling below for answer.

 

 

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1. Turn on switch A for 5 minutes or so.  Now turn it off and turn on switch B.  Enter the room.  Upon entering, the lit bulb is clearly connected to B.  Feel the other two bulbs.  The one which is warm is attached to A.  By process of elimination, the cool one is connected to C. 

2. Take the pig across the river and leave it there.  Now come back and get the wolf.  Take him across.  On the return trip, bring the pig back to the original side of the river.  This time across take the carrot over and leave it safely with the wolf.  Finally, go back for the pig and bring it across.  All three are now on the other side of the river.  Journey on.