If a·b·c·d=360, 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? Choose the correct option.
A) 9 B) 10 C) 11 D) 13 E) 15
prime factorize : 360 = 2*3*5*12   Hence a = 2 and d = 12 .   Hence answer is  12 - 2= 
<gadget id="calculator"> 12 - 2</gadget>
<output>10</output>
10   Answer 10
<result>B</result>
If a·b·c·d=360, 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?