5,9,19,31,51,__  Choices
A) 84
B) 80
C) 81
D) 82
E) 83
(9+5) +5= 
<gadget id="calculator">(9+5) +5</gadget>
<output>19</output>
19   (16+9) +6= 
<gadget id="calculator">(16+9) +6</gadget>
<output>31</output>
31   (28+16)+7= 
<gadget id="calculator">(28+16)+7</gadget>
<output>51</output>
51   (48+28)+8= 
<gadget id="calculator">(48+28)+8</gadget>
<output>84</output>
84   84NSWER:84
<result>A</result>
5,9,19,31,51,__