1 and 5 both are.
The greatest factor of 15 is 15. The greatest factor of 20 is 20. The greatest common factor of 15 and 20 is 5.
The factors of 20 are 1, 2, 4, 5, 10, and 20No, 15 is not a factor of 20.
The greatest common factor of 15, 20, and 25 is 5.
The greatest common factor of 15 and 20 is 5.
The GCF of 15, 20, and 30 is 5.5
The highest common factor is 5
The Greatest Common Factor of 15, 20 and 25 is 5.
The only common factor of 15, 20 and 24 is 1.
The common factor of 15, 16, and 20 is just 1
It is: 5
The GCF of 20 and 40 is 20 The GCF of 15 and 30 is 15 The GCF of 15, 20, 30 and 40 is 5.
The greatest common factor of 15, 20, and 25 is 5.The HCF (Highest Common Factor) of 15, 20, and 25, can be easily determined, since all of the values end in 0 or 5, therefore, each of them are divisible by 5. 15/5 = 3, 20/5 = 4, and 25/5 = 5, which 3 and 5 are prime. Therefore, 5 is the GCF (HCF) of 15, 20, and 25.