Tuesday, October 11, 2011

505

505 = 5 x 101.

505 has two representations as a sum of two squares: 505 = 82 + 212 = 122 + 192.

505 is the hypotenuse of two primitive Pythagorean triples: 5052 = 2172 + 4562 = 3362 + 3772.

5053 = 593 + 1633 + 4993, where 59, 163, and 499 are primes.

505 is the magic constant for a 10 x 10 normal magic square.


505 is the model number of a type of denim jeans produced by Levi Strauss & Co.

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