The sum of three consecutive even numbers is 20 more than the first of these numbers. What is the middle number?	Choose the correct choice from the following choices:
A) 7
B) 9
C) 11
D) Cannot be determined
E) None of these
Solution   Let the numbers be x, x + 2 and x + 4.   Then, x + (x + 2) + (x + 4) = x + 20 ⇔ 2x = 14 ⇔ x = 7.   ∴ Middle number = x + 2 = 9.   Answer 9
<result>B</result>
The sum of three consecutive even numbers is 20 more than the first of these numbers. What is the middle number?