The product of three consecutive numbers is 720. Then the sum of the smallest two numbers is ?	Choose the correct answer:
A) 11  B) 15  C) 17  D) 38  E) 56
Product of three numbers = 720   720 = 8*9*10   So, the three numbers are 8, 9 and 10.   And Sum of smallest of these two = 8 + 9= 
<gadget id="calculator">8 + 9</gadget>
<output>17</output>
17.   ANSWER : OPTION 17
<result>C</result>
The product of three consecutive numbers is 720. Then the sum of the smallest two numbers is ?