Post Number:#1 by dshasan » Sat Jun 10, 2017 11:52 pm
Let $n$ be a positive integer. Determine, in terms of n, the number of $x$ such that $x \in {1,2,...n}$ and \[x^2 \equiv x(mod n)\]
The study of mathematics, like the Nile, begins in minuteness but ends in magnificence.
- Charles Caleb Colton