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A Mathematica'l Magic Trick
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| Organization: | Macalester College |
| Department: | Department of Mathematics and Computer Science |
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| The College Mathematics Journal |
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Ask someone with a calculator to square the four-digit number obtained by concatenating his or her month and date of birth. The have the subject square his or her year of birth. Now ask for the sum of the two numbers. In an instant, with some help from Mathematica and a function called BirthDate (user-defined, not built into Mathematica), you reply with the birth date.
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