Mental Floss 177

The answer to last week’s challenge is, Q: On the first day of school, someone murdered a history teacher. There were four people at the school that the police suspected had done it: the landscaper, a math teacher, a basketball coach, and the principal. These were their alibis: The landscaper said he was outside mowing the lawn. The math teacher said he was giving a mid-year test. The basketball coach said he was running practice drills with his players. The principal said she was in her office. After giving their alibis, the police arrested the killer immediately. Who killed the history teacher and how did the police know?

A: The math teacher killed the history teacher. He claimed that he was giving a mid-year test, but it was the first day of school. This “simple” math puzzle for children has left the internet stumped.

This week’s challenge is:

Q: A serial killer kidnapped five different people and sat them down each with two pills in their hand and a glass of water. He told them each to take one pill but warned them that one was poisonous and the other was harmless. Whichever pill the victim didn’t take, the serial killer would take. Every victim somehow chose the poisonous pill and died. How did the serial killer get them all to take the poisonous pill?

The answer along with a new challenge, next week.

Have an excellent weekend …

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