At the start of a YouTube video titled “Art of Problem Solving: Least Common Multiple,” Richard Rusczyk invites viewers to play a game. Every twenty-four seconds, we’re supposed to clap; every ...

Tech companies like Amazon are rumored to pose challenging math problems during interviews. A viral YouTube video explores a tricky math problem allegedly used in an Amazon interview. The problem ...

But, both of these would require large structural changes for a course that teaches hundreds of students a year — something that can’t really happen in the near term. What could happen now, though, is ...

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