What is the least common multiple (LCM) of 12 and 18? A 6 B 36 C 72 D 216 ✓ Correct Answer: Option B 12 = 2² × 3; 18 = 2 × 3². LCM = 2² × 3² = 36. Practice ACT Exam Prep Quizzes → Browse All Questions Study Flashcards