If a·b·c·d=330, where a, b, c and d are positive integers, and a<b<c<d, which of the following could be the value of d−a? Select the correct option:
A) 9  B) 10  C) 11  D) 13  E) 15
prime factorize : 330 = 2*3*5*11   Hence a = 2 and d = 11 .   Hence answer is  11 - 2= 
<gadget id="calculator"> 11 - 2</gadget>
<output>9</output>
9   9nswer 9
<result>A</result>
If a·b·c·d=330, where a, b, c and d are positive integers, and a<b<c<d, which of the following could be the value of d−a?