In what modulus is it true that 9 + 8 = 5?
A
mod 10
B
mod 11
C
mod 12
D
mod 13
Verified Correct Answer: C.
Step-by-Step Mathematical Solution
9 + 8 = 17
17 + mod 12 = 1 rem 5
it is mod 12
Source: Myschool Past Questions Archive (Record #36996)