# Puzzle | Rat and Poisonous Milk Bottles

You have **4 bottles of milk**. One of them is **poisonous** while the other 3 are non-poisonous. There is a rat which dies exactly after 10 hours of drinking the poisoned bottle. You have a clock that measures time only in hours. Suggest an **optimal strategy** to identify the poisoned bottle within 24 hours.

**Solution:**

At the beginning of the first hour feed the rat the Ist bottle. At the start of 2nd-hour feed, the 2nd one and

similarly at the start of 3rd-hour feed, the 3rd bottle. If the rat dies after exactly 10 hrs, the first bottle

is poisonous. If it dies after 11 hours, 2nd one contains poison else the 3rd one is poisonous. In this way,

after exactly 12 hours you would be able to determine the poisonous bottle.

## Recommended Posts:

- Puzzle | 100 Cows And Milk
- Puzzle | 10 identical bottles of pills
- Puzzles | (Cryptanalysis, Bottles Problem, Dinner Time, Mystery)
- Puzzle 51| Cheryl’s Birthday Puzzle and Solution
- Puzzle 15 | (Camel and Banana Puzzle)
- Puzzle 34 | (Prisoner and Policeman Puzzle)
- Puzzle | 3 Priests and 3 devils Puzzle
- Puzzle 85 | Chain Link Puzzle
- Puzzle 81 | 100 people in a circle with gun puzzle
- Puzzle 27 | (Hourglasses Puzzle)
- Puzzle 24 | (10 Coins Puzzle)
- Puzzle 28 | (Newspaper Puzzle)
- Puzzle 29 | (Car Wheel Puzzle)
- Puzzle | Elevator Puzzle
- Puzzle 33 | ( Rs 500 Note Puzzle )

If you like GeeksforGeeks and would like to contribute, you can also write an article using contribute.geeksforgeeks.org or mail your article to contribute@geeksforgeeks.org. See your article appearing on the GeeksforGeeks main page and help other Geeks.

Please Improve this article if you find anything incorrect by clicking on the "Improve Article" button below.