How would you divide 50 black and 50 white marbles into two piles so that the probability of picking a white marble as follows is maximized: we first pick one of the piles uniformly at random, then we pick a marble in that pile uniformly at random?
Source : http://gurmeetsingh.wordpress.com/puzzles/
 
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Find the poisoned wine barrel
An enemy spy has poisoned one out of 1000 barrels of wine in a king’s cellar. Even a sip of the poisoned wine has potency to kill. However, the effects of the poison show only in 30 days. The king asks the royal jailor to identify the poisoned barrel within 30 days. What is the least number of prisoners the jailor must employ to identify the poisoned barrel
Source : http://gurmeetsingh.wordpress.com/2008/09/12/puzzle-poisoned-wine-barrels/
Source : http://gurmeetsingh.wordpress.com/2008/09/12/puzzle-poisoned-wine-barrels/
ping.fm - better than friendfeed, just what I want
Experimenting with ping.fm's Y! bot. You can post to the huge set of social networks http://ping.fm supports - all using their integration with IMs, SMS and Web. Prety cool :)
Rope Escape
Rajeev is trapped atop a building 200m high. He has with him a rope 150m long.There is a hook at the top where he stands.
Looking down, he notices that midway between him and the ground, at a height of 100m, there is a ledge with another hook. In his pocket lies a Swiss knife.
How might he be able to come down using the rope, the two hooks and the Swiss knife?
Source : http://gurmeetsingh.wordpress.com/puzzles/
Looking down, he notices that midway between him and the ground, at a height of 100m, there is a ledge with another hook. In his pocket lies a Swiss knife.
How might he be able to come down using the rope, the two hooks and the Swiss knife?
Source : http://gurmeetsingh.wordpress.com/puzzles/
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