Puzzle: A Choral Arrangement

A few months ago I wrote about my favorite puzzles from the 2020 MIT Mystery Hunt, where I called the Mystery Hunt "one of my favorite things". Another one of my favorite things is actually writing these kinds of puzzles. I intend to occasionally post puzzles on this blog, and this is the first one! …

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Chris the Criminal: A mathematical puzzle

(Warning: the comments on this post contain spoilers!) Chris the Criminal flips a fair coin. If it comes up heads he commits a crime. If it comes up tails, he doesn't. Now, Chris is being tried before a jury of n people (n is at least 2). The jury members all know the process by …