Which of the following are/is prime?
I. 145
II. 147
III. 149
Pick one.
A) II only
B) III only
C) III
D) IIII
E) I, II,III
1) 143 = 13*11 so we know it is not prime quickly eliminate all options having 1 as a choice   which leaves us with 2 ) and 3) as possible answers   From here on we find 147 = 3* 49 so we eliminate 147 which leaves us with 149 as the only possible solution   III
<result>C</result>
Which of the following are/is prime?
I. 145
II. 147
III. 149