Question

Question about Modular Arithmetic

Answer 1

,. . .

Answer 2

If:
\[11 = 1(\mod 5)\]

then isn't this also true?

\[11= 1(\mod2)\]

just curious, but how do you decide what to mod it by?

Answer 3

the definition for basic congruences states that. .

"if n divides (a-b), then a=b(mod n) is congruent. ."

try to check your given congruence. .