The common factors of 15 and 20 are 5, 1, intersecting the two sets above. In the intersection factors of 15 ∩ factors of 20 the greatest element is 5. Therefore, the greatest common factor of 15 and 20 is 5.Click to see full answer. Similarly, what are the common factors of 15?The factors of 15 are 1, 3, 5, and 15. The factors of 30 are 1, 2, 3, 5, 10, 15, and 30. The common factors of 15 and 30 are 1, 3, 5, and 15.Likewise, what are the factors of 20? If a number can be expressed as a product of two whole numbers, then the whole numbers are called factors of that number. So, the factors of 20 are 1, 2, 4, 5, 10 and 20. Likewise, people ask, what are the common factors of 15 and 25? 1 Answer The Greatest Common Factor of 15and25 is 5. The factors of 15 are 3and5. (the number itself and 1 do not count). The factor(s) of 25 is 5 . After all, it is a square number. The only factor that is in common is 5. (again remember that 1 does not count here -although 1 is common, 5 is higher) What are the common factors of 9 and 15?We found the factors and prime factorization of 9 and 15. The biggest common factor number is the GCF number. So the greatest common factor 9 and 15 is 3.
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