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PUZZLES
1. A light bulb is hanging in a room. Outside of the room, there are three switches, of which only one is connected to the lamp. In the starting situation, all switches are 'off' and the bulb is not lit.
The question: If it is allowed to check in the room only once to see if the bulb is lit or not (this is not visible from the outside), how can you determine with which of the three switches the light bulb can be switched on?
PUZZLES: Text
2. A man has a wolf, a goat, and a cabbage. He must cross a river with the two animals and the cabbage. There is a small rowing boat, in which he can take only one thing with him at a time. If, however, the wolf and the goat are left alone, the wolf will eat the goat. If the goat and the cabbage are left alone, the goat will eat the cabbage.
The question: How can the man get across the river with the two animals and the cabbage?
PUZZLES: Text
PUZZLES: Text
4. The 4 criminals are lined up on some steps. They are all facing in the same direction. A wall separates the fourth man from the other three.
So to summarize:
Man 1 can see men 2 and 3.
Man 2 can see man 3.
Man 3 can see none of the others.
Man 4 can see none of the others.
The criminals are wearing hats. They are told that there are two white hats and two black hats. The men initially don’t know what colour hat they are wearing. They are told to shout out the colour of the hat that they are wearing as soon as they know for certain what colour it is. They are not allowed to turn around or move.
They are not allowed to talk to each other. They are not allowed to take their hats off.
The question: Who is the first person to shout out and why?
PUZZLES: Text
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