I promised you another puzzle. This relates to combination locks. Imagine a combination lock that has three buttons. To open the lock you have to push the buttons, one at a time, in the correct order. What is the probability that you guess the order right on the very first time.
To figure this out, write out all of the possible orders. You might want to label the buttons A,B,C in order to think about the possiblities.
As soon as I find a good magic square, I will add it.
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