The Poison Puzzle

 
Published on April 10, 2014
Channel: Pgapuzzles
Category: Education
Source: Youtube

Emperor Samrat is planning to celebrate his victory over neighboring king. There are 1000 bottles of wine arranged for the party . But a mischievous person adds poison in one of the bottles. There is just one hour left for the party. The king has some rats which die within one hour even if they are given even a slightest of the dose of poison. What is the minimum number of rats needed to find the bottle which contains the poison?