Question

Work out 3 plus 4(mod 5) using a dail.

Answer 1

Answer:

Definition 3.1 If a and b are integers and n > 0, we write a ≡ b mod n to mean n|(b − a). ... For example, 29 ≡ 8 mod 7, and 60 ≡ 0 mod 15. The notation is used because the properties of congruence “≡” are very similar to the properties of equality “=”.