Question

Perform the modular arithmetic operation.

[(5 - 9) ∙ 3] (mod 5)
A. 1

B. 2

C. 0

D. 3

Answer 1

[(5 - 9) ∙ 3] (mod 5)


[(-4) ∙ 3] (mod 5)


-12 (mod 5)


-2 (mod 5)


3 (mod 5)


So [(5 - 9) ∙ 3] (mod 5) = 3 (mod 5)