If 12/x is an integer and 4/x is an integer, which of the following must be true? I. 4/x is an integer II. 18/x is an integer III. 3/x is an integer
Pick one:  A) III only  B) II only  C) II,III only  D) I,III only  E) I only
The question asks which of the following MUST be true, not COULD be true. The largest possible value of x is 4, GCD of 12 and 4, and if x=4 then ONLY I is true.   Answer: I only
<result>E</result>
If 12/x is an integer and 4/x is an integer, which of the following must be true? I. 4/x is an integer II. 18/x is an integer III. 3/x is an integer