How many rotations does a 1 in radius disk make around a 3 in radius disk? ChatGPT eventually solved it

I watched this great Veritasium video: about an SAT question, where all the answers were wrong, having to do with how many rotations one disk makes around another. I asked ChatGPT if it knew the answer and it got the “seemingly” correct answer. When I told it was the correct answer was, it was able to reason out why.

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