Multiple choice What is the greatest common factor of 2527 and 18228? 7 9 18 27 Reveal answer Fill a bubble to check yourself A Correct answer Explanation Factors of 2527 = 7 × 19 × 19 Factors of 18228 = 7 × 2 × 2 × 3 × 7 × 31 HCF of 2527 and 18228 = 7