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@Iris Not to worry, it's very nice to hear from you. 🙂 Hope you are enjoying the course ~~
@ingeniousosprey Thanks for letting me know about the typo; I've fixed it! 🙂
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You can ignore this question. I see Professor Loh answered it. It is called "magic" because all the rows and columns and diagonals all add up to the same number.
Sorry Sir - By 9 in the middle I meant 9 in the middle of the first row. However thank you for greatly explaining the concept.
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