Multiple choice What is the fourth multiple of the greatest common factor of 6 and 18? 24 28 30 36 Reveal answer Fill a bubble to check yourself A Correct answer Explanation Factors of 6 = 1, 2, 3, 6 Factors of 18 = 1, 2, 3, 6, 9, 18 Greatest common factor = 6 6 × 4 = 24