The third proportional to 2 and 6 is?  Pick one.
A) 18  B) 17  C) 14  D) 15  E) 13
(6*6)/2= 
<gadget id="calculator">(6*6)/2</gadget>
<output>18</output>
18   18nswer:18
<result>A</result>
The third proportional to 2 and 6 is?