Ononot — Find the sum of all x \in \{0, 1, \dots, 29\} such that x^2

Guest Session: 1 Question Remaining. Create Account to save progress.

Modular Arithmetichard

0:00.0

Find the sum of all $x \in \{0, 1, \dots, 29\}$ such that $x^2 \equiv x \pmod{30}$ .