SOLUTION: Show that any positive integer N = 7 modulo 8 can never be expressed as the sum of the squares of three other positive integers.
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Divisibility and Prime Numbers
-> SOLUTION: Show that any positive integer N = 7 modulo 8 can never be expressed as the sum of the squares of three other positive integers.
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Question 370027: Show that any positive integer N = 7 modulo 8 can never be expressed as the sum of the squares of three other positive integers. Answer by Sphinx pinastri(17) (Show Source):