The sum of three consecutive multiples of 3 is 72. What is the larget number?  Pick:
A) 26  B) 27  C) 46  D) 57  E) None
Sol.   Let the numbers be 3x, 3x + 3 and 3x + 6.   Then, 3x + (3x + 3) + (3x + 6) = 72 ⇔ 9x = 63 ⇔ x = 7.   ∴ Largest number = 3x +6 = 27.   Answer 27
<result>B</result>
The sum of three consecutive multiples of 3 is 72. What is the larget number?