Enigma 1537: A name game
18 April 2012
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From New Scientist #2700, 21st March 2009 [link]
A school class consisted of Elsa, John, Marty, Paul, Sheila, Smack and Suzy. I explained to them that a 3-by-3 magic square consists of an array of nine different numbers such that any row, column or diagonal has the same sum. I asked each of them to make one using only whole numbers between 1 and 26 inclusive.
They each succeeded and I then asked them to replace their numbers by letters using A=1, B=2, C=3 and so on. Amazingly, in every case but one the child’s magic square contained the letters of their name.
Whose did not?