Question

the hcf of 15 and 45 step by step method
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Answer 1

The factors of 45 are 45, 15, 9, 5, 3, 1. The common factors of 15 and 45 are 15, 5, 3, 1, intersecting the two sets above. In the intersection factors of 15 ∩ factors of 45 the greatest element is 15. Therefore, the greatest common factor of 15 and 45 is 15.