An intruder broke into the king’s wine cellar where he stored 1000 bottles of wine. The intruder poisoned one of the 1000 bottles, but got away too quickly for the king’s guard to see which one he poisoned or to catch him.
The king needs the remaining 999 safe bottles for his party in 4 weeks. The king has 10 dogs which he considers disposable. The poison takes about 3 weeks to take effect, and any amount of it will kill whoever (person or animal) drinks it. How can the king figure out which bottle was poisoned in time for the party?
I assume most people get the solution for the last brain teaser. Drop me a line if you have questions.