What is the highest common factor of 45 and 72?

Answer 1

The highest common factor (HCF) of 45 and 72 is the largest number that divides both 45 and 72 without leaving a remainder. To find the HCF, you can use methods like prime factorization or the Euclidean algorithm. In this case, the prime factorization of 45 is 3 x 3 x 5 and the prime factorization of 72 is 2 x 2 x 2 x 3 x 3. The common factors between 45 and 72 are 3 and 9 (3 x 3), so the HCF of 45 and 72 is 9.

Answer 2

The Greatest Common Factor of 45 and 72 is 9.

3 x 3 = 9

Answer 3

The Greatest Common Factor (GCF) is: 9

Answer 4

9

Answer 5

11