What is the greatest of 3 consecutive integers whose sum is 21 ? Pick one: A) 6 B) 7 C) 8 D) 9 E) 5

Rationale: "the sum of three consecutive integers can be written as n + ( n + 1 ) + ( n + 2 ) = 3 n + 3 if the sum is 24 , we need to solve the equation 3 n + 3 = 21 ; = > 3 n = 18 ; = > n = 6 the greatest of the three numbers is therefore 6 + 2 = 8 answer : c"
Answer: C