The sum of three consecutive even numbers multiples of 3 is 72. what is the largest number ? Choose the correct choice from the following answers.
A) 21	B) 24	C) 27	D) 36	E) None
Solution   let the number be x and x + 2.   Then, (x + 2)2 - x2 = 84 ⇔ 4 x + 4 = 84 ⇔ 4 x = 80 ⇔ x = 20.   ∴ Required sum = x + (x + 2) = 2 x + 2 + (  + 2)= 
<gadget id="calculator">+ (  + 2)</gadget>
<output>2</output>
2 x + 2= 42.   Answer 27
<result>C</result>
The sum of three consecutive even numbers multiples of 3 is 72. what is the largest number ?