The answer to this question would be true.
An odd number wouldn't have any 2 in their factor because it is the definition of odd number, can't be divided by 2. Since they have no probability of having factor 2, then their GCF would not become an even number.
1√3 +4√3
= (1+4)√3
= 5√3
The appropriate choice is
b. 5√3
i'm not sure how to help with the second thing, but for what looks like a quizzes, i think it should be 186