If a and b are unique prime integers, which of the following must be odd?
Options:
(A) a−b
(B) 2a+2b
(C) 2a−2b
(D) 2a / 2b
(E) ab^2 OK. Let's think. Some random thoughts first:
user
Any number multiplied by 2 has to be an even number. hence The answer: (A).
assistant