Insert the missing number
5, -10, 20, -40, 80, (....)
Choose the correct answer.
A) 160
B) -160
C) 100
D) -100
E) 0
5*-2=-10   -10*-2= 
<gadget id="calculator">-10*-2</gadget>
<output>20</output>
20   20*-2=-40   -40*-2= 
<gadget id="calculator">-40*-2</gadget>
<output>80</output>
80   80*-2=-160   ANSWER:-160
<result>B</result>
Insert the missing number
5, -10, 20, -40, 80, (....)