The correct solution was 18.
The correct answer was 15.
The correct answers are 6 and 4/3.
The correct answers are 5/2 and 10.
The correct answers are 4 and 8.
The correct answer is n = 5.
The correct answer was 20.
The correct answers are 4, 8, and 9.
The correct answer is 24.
The correct answer is n = 14.
