Number Theory

Quadratic Residues

Quadratic Residues - Primes

         

Is 5 a quadratic residue modulo 7?

Which of these is the set of non-quadratic residues modulo 1111?

Which of these is the set of quadratic residues modulo 1515?

Find the sum of all positive integers x<22x<22 such that x217(mod22)x^2 \equiv 17 \pmod {22} .

Is 1515 a quadratic residue modulo 1717?

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