Number TheoryEasyModular Arithmetic ShareModular Arithmetic · Easy problemHow many residues x∈{0,1,2,…,7}x \in \{0, 1, 2, \ldots, 7\}x∈{0,1,2,…,7} satisfy x2≡1(mod8)x^2 \equiv 1 \pmod 8x2≡1(mod8)?Check Show answer Walk through it step by step Practice more like this Review this concept