Calculate the HCF of 16, 108, 220	Choose the correct answer.
A) 3 B) 5 C) 4 D) 1 E) 2
Explanation:   Lets solve this question by factorization method.   The factors of 16 are: 1, 2, 4, 8, 16   The factors of 108 are: 1, 2, 3, 4, 6, 9, 12, 18, 27, 36, 54, 108   The factors of 220 are: 1, 2, 4, 5, 10, 11, 20, 22, 44, 55, 110, 220   Then the greatest common factor is 4.   Answer: Option 4
<result>C</result>
Calculate the HCF of 16, 108, 220