If x is a prime integer and y = 9x, which of the following CANNOT be a divisor of y? Choose one.
A) 18	B) 45	C) 28	D) 27	E) 99
Prime integer are as follows as 2,3,5,7,11.,   y = 9x   Go with options   if it is 18 so x must be 2 which is a prime integer   if it is 45 so x must be 5 which is a prime integer   if it is 28 so x must be 4 which is not a prime integer   so ans is 28
<result>C</result>
If x is a prime integer and y = 9x, which of the following CANNOT be a divisor of y?