https://doi.org/10.4169/college.math.j.46.3.172 https://www.jstor.org/stable/10.4169/college.math.j.46.3.172 The College Mathematics Journal emphasizes the first two ...
I have listed in random order five positive integers, four of two digits and one of one digit. They use each of the digits 1 to 9. None of the two-digit integers has any factor greater than 1 in ...
At first glance, the 153 looks really meaningless. Yet, it has amazing mathematical properties. Moreover, it was not only explicitly mentioned in the Bible and, for various reasons, brings a smile to ...
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