MARY HAD 100 DOLLARS TOM HAS 50 DOL RIDDL RIDDLES WITH ANSWERS TO SOLVE - PUZZLES & BRAIN TEASERS

Bells Did you answer this riddle correctly?
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Tombstone Did you answer this riddle correctly?
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A tombstone Did you answer this riddle correctly?
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Bat Did you answer this riddle correctly?
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Russian Roulette
Probability puzzles require you to weigh all the possibilities and pick the most likely outcome.


Puzzle ID: #17681
Fun: *** (2.59)
Difficulty: ** (2.07)
Category: Probability
Submitted By: JMCLEOD****
Corrected By: cnmne








You are in a game of Russian Roulette with a revolver that has 3 bullets placed in three consecutive chambers. The cylinder of the gun will be spun once at the beginning of the game. Then, the gun will be passed between two players until it fires. Would you prefer to go first or second?


Answer
Label the chambers 1 through 6. Chambers 1 through 3 have bullets and chambers 4 through 6 are empty. After you spin the cylinder there are six possible outcomes:

1. Chamber 1 is fired first: Player 1 loses
2. Chamber 2 is fired first: Player 1 loses
3. Chamber 3 is fired first: Player 1 loses
4. Chamber 4 is fired first: Player 2 loses (First shot, player 1, chamber 4 empty. Second shot player 2, chamber 5, empty. Third shot player 1, chamber 6 empty. Fourth shot player 2, chamber 1 not empty.)
5. Chamber 5 is fired first: Player 1 loses (First shot, player 1, chamber 5 empty. Second shot player 2, chamber 6, empty. Third shot player 1, chamber 1 not empty.)
6. Chamber 6 is fired first: Player 2 loses (First shot, player 1, chamber 6 empty. Second shot, player 2, chamber 1, not empty)

Therefore player 2 has an 4/6 or 2/3 chance of winning. Did you answer this riddle correctly?
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Envelope. Eye is a potential alternative. When spoken out loud it sounds like a single letter (I). Did you answer this riddle correctly?
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A queen Did you answer this riddle correctly?
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A cat-has-trophy! Did you answer this riddle correctly?
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Jack-o-lattern Did you answer this riddle correctly?
YES  NO  

His car door! Did you answer this riddle correctly?
YES  NO  

Vanishing Cream Did you answer this riddle correctly?
YES  NO  

The answer is 20. Many people have been guessing anywhere from 9 to 19, but the correct answer is 20. Did you answer this riddle correctly?
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5

You walked into the room which added 1 + 34 = 35

Then you take away 30 from 35 = 5 Did you answer this riddle correctly?
YES  NO  

One of the 'fathers' is also a grandfather. Therefore the other father is both a son and a father to the grandson.

In other words, the one father is both a son and a father. Did you answer this riddle correctly?
YES  NO  

50 pounds.

In the beginning it is 99 pounds water and 1 pound other stuff. At the end the 1 pound other stuff is 2 percent so the total weight is 50 pounds. 50 pounds - 1 pound other stuff = 49 pounds water. So 99 pounds - 49 pounds = 50 pounds water lost. Did you answer this riddle correctly?
YES  NO