Question

If a ≡ b (mod m) and x is an integer, then which of the following is incorrect ?

• A. (a + x) ≡ (b + x)(mod m)
• B. (a - x) ≡ (b - x)(mod m)
• C. ax ≡ bx (mod m)
• D. (a - x) ≡ (b + x) (mod m)

Answer 1

The Correct Option is D

The correct option is (D) : (a - x) ≡ (b + x) (mod m).