Ice Tea Murder
Riddle: Two girls ate dinner together. They both ordered iced tea. One girl drank them very fast and had finished five in the time it took the other to drink just one. The girl who drank one died while the other survived. All of the drinks were poisoned. How did the girl who drank the most survive?
Answer: The poison was in the ice. The survivor girl didn't give time for the ice to melt. Whilst the dead girl waited until the ice melted which meant that the poison was released into her drink.
Source: https://www.riddles.com/5709
