Three consecutive even integers have a sum of 54. What is the largest integer?

Question: Three consecutive even integers have a sum of 54. What is the largest integer?

1. 20
2. 21
3. 19
4. 22

Correct Answer: A — 20

Explanation: Let the integers be n, n + 2 and n + 4; their sum gives n.
If the first is n, then 3n + 6 = 54; the largest is 20.