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1. You are at a game show and there are three closed doors.
There is a prize hidden behind one of the doors and the game show
host knows where it is. You are asked to choose a door. The game
show host then opens one of the other two doors showing that it is
empty and asks you if you would like to change your selection.
Should you stick to your original selection?
Solution
2. You are in a race and you overtake the person who is in
second place. What is your position now?
Solution
3. Six drinking glasses stand in a row, with
the first three full of juice and the next three empty. By moving
only one glass can you arrange them so empty and full glasses
alternate?
Solution
4. A man is asked what his daughters look like. He answers,
"They are all blondes, but two, all brunettes, but two, and all
redheads, but two." How many daughters did he have?
Solution
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