Question

Find HCF of I) 72,66 and 30.

Answer 1

GCF = 2

for the values 40, 66, 72

Solution by Factorization:

The factors of 40 are: 1, 2, 4, 5, 8, 10, 20, 40

The factors of 66 are: 1, 2, 3, 6, 11, 22, 33, 66

The factors of 72 are: 1, 2, 3, 4, 6, 8, 9, 12, 18, 24, 36, 72

Then the greatest common factor is 2.

Answer 2

The factors of 30 are: 1, 2, 3, 5, 6, 10, 15, 30

The factors of 66 are: 1, 2, 3, 6, 11, 22, 33, 66

The factors of 72 are: 1, 2, 3, 4, 6, 8, 9, 12, 18, 24, 36, 72

Then the greatest common factor is 6.