An Ancient Typo

This is probably the most famous image of Pascal’s Triangle in math history (Yang Hui’s triangle, from the 13th century). It was on the cover of my combinatorics book in college.


However, the diagram contains a mistake. Where is it?


5 Responses

  1. I don’t read these numbers, but is that a 34 instead of a 35?

    Or is the 70 weird?


  2. Correct the first time. It should be symmetrical but the numbers are different.

  3. Wow. Amazing how many times you can look at something and never really *see* it.

    Great catch!

  4. […] Warrior Jason Dyer posts An Ancient Typo. Can you spot the […]

  5. […] #2, Jason Dyer (@jdyer) challenged us to spot An Ancient Typo in some Chinese math […]

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