Question: 1.Use Eulers Theorem to compute 789 modulo 100. ? 2.Prove that for every even positive integer n, n2 1 divides 2n! 1? 3.Find all primes

1.Use Eulers Theorem to compute 789 modulo 100. ?

2.Prove that for every even positive integer n, n2 1 divides 2n! 1?

3.Find all primes p such that p|2p + 1. ?

4.Prove that there are innitely many positive integers n such that (n) is a perfect square.?

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