In the video, Prof. Loh explains how to find the middle number (9) by using algebra. But apparently, my brain wasn't satisfied with that method, so I accidentally possibly came up with a shortcut... maybe. Here's how I did it: I simply found the median of the 9 numbers, which was also 9. It actually kinda makes sense because in previous problems, the middle number was always the median of the numbers given. But I also know that there are often weird coincidences in math, (when you get the right answer the wrong way) so that's why I'm asking this wonderful math community 🙂
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