The GCF is 5.
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The greatest common factor of 20 and 25 is 5:The factors of 20 are 1, 2, 4, 5, 10 and 20.The factors of 25 are 1, 5, and 25.The common factors of 20 and 25 are therefore 1 and 5 (and 5 is, of course, the highest).The HCF is: 5
The greatest common factor of 15, 20, and 25 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.
25
The highest common factor of 175 and 200 is: 25