Which values of xxx satisfy x2≡0(mod16)x^2 \equiv 0 \pmod{16}x2≡0(mod16)?
x≡0(mod16)x \equiv 0 \pmod{16}x≡0(mod16)
x≡4(mod8)x \equiv 4 \pmod{8}x≡4(mod8)
x≡0(mod4)x \equiv 0 \pmod{4}x≡0(mod4)
x≡8(mod16)x \equiv 8 \pmod{16}x≡8(mod16)