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ronret45 loves solving puzzles at PuzzleFry.com. I am proud PuzzleFry member and like my time invested in solving brain teasers.
• You have 3 switches in a room. One of them is for a bulb in next room. You can not see whether the bulb is on or off, until you enter the room. What is the minimum number of times you need to go in to the room to determine which switch corresponds to the bulb in next room.

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• Given the size of the chess board and initial position of the knight, what is the probability that after k moves the knight will be inside the chess board.

Note:-
1) The knight makes its all 8 possible moves with equal probability.
2) Once the knight is outside the chess board it cannot come back inside.

Puzzlefry added Info-
This challenge is originally from a blog post of crazyforcode.com published under the CC BY-NC-ND 2.5 IN licence.

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• One person has some money in his pocket, He visits four temple on the way. As soon as he enters a temple, his money gets double and he offers Rs. 100 in each temple thus his pocket gets empty after he returns from the fourth temple. Now the question is how much money he had initially ?

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• ## Mr John have 25 horses, and he want to pick the fastest 3 horses out of those 25. He has only 5 track that means only 5 horse can run at a time,even he don’t have a stop watch . What is the minimum number of races required to find the 3 fastest horses?

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