What is the sum of two consecutive even numbers, the difference of whose squares is 84? Options
A) 34	B) 38	C) 42	D) 46	E) None
EXPLANATION   Let the numbers be x and x + 2.   Then, (x + 2)2 – x2 = 84   4x + 4 = 84   4x = 80   x = 20.   The required sum = x + (x + 2) = 2x + 2 + (  + 2)= 
<gadget id="calculator">+ (  + 2)</gadget>
<output>2</output>
2x + 2= 42.   Answer 42
<result>C</result>
What is the sum of two consecutive even numbers, the difference of whose squares is 84?