7th number in the series....
99,18,36,9,18	Choose the correct choice from the following options
A) 17 B) 18 C) 19 D) 20 E) 21
its 7 th number in the series 99,18,36,9,18,_,?   99 18.....9+9=18*2= 
<gadget id="calculator">18*2</gadget>
<output>36</output>
36   36 9.......3+6=9*2= 
<gadget id="calculator">9*2</gadget>
<output>18</output>
18   18 ?........1+8=9*2= 
<gadget id="calculator">9*2</gadget>
<output>18</output>
18   ANSWER:18
<result>B</result>
7th number in the series....
99,18,36,9,18