Matt Parker shows off his Magic Square party trick (unlike magicians, mathematicians often reveal their secrets).
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Although this method is an awesome trick to show your friends, it has 1 flaw. What happens when the number you are given is the same as another number after you subtract it? Do you tell them to say a different number?
Well, I use my personal method called par position that combines position of a number assigned to a letter, which I call 1432
A 1 2 3 4
B 5 6 7 8
C 9 10 11 12
D 24 25 26 27
Using my position algorithm I get
1 8 11 25
26 10 5 4
6 3 27 9
12 24 2 7
One thing I find interesting is that when he shows the magic square in the graphic, the 4 square that is one row above the center and the one below the center add up to the number (I'll say 42) but the 4 square that is one column left of the center and one right of the center does not. Would be interesting to see if it is possible to make it so that those would add to 42 as well.
But wait...the first square has 11, 8, 10, and 5. Those add up to 44, not 42. Same with 21, 2, 24, 3 (makes 50, not 42). You add every other column, row, diagonal, and 2x2 square but those two. Why the fail there?
Having a good relationship with others.
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