Modular Congruence
Defines equivalence modulo n.
a ≡ b (mod n) ⇔ n | (a−b)
Variables
- n
- modulus
Example
17≡5 mod 12
How to use this formula
Identify the known values, keep units consistent, substitute the values into the formula, and calculate carefully. Then check whether the result is reasonable for the original problem.