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(just those submitted by Gaydos)
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Just showing those entries submitted by 'Gaydos': (Click here to show all)

+ The sum of reversals of the first five squares (1+4+9+61+52) as well as the sum of the reversals of the first four cubes (1+8+72+46). [Gaydos]

+ 2^127 plus its reverse is a prime number. [Gaydos]

+ There are 127 possible prime U.S. Zip Codes that contain exactly two different digits (from 00002 to 99991). [Gaydos]




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