They are 1 and 5
No, 10 is not a factor of either 15 or 25. Any number for which 10 is a factor will end in 0. Both 15 and 25 have 5 as a factor, but not 10.
It is 25
The GCF is 5.
No. Not "No, I won't explain how" but "No, 10 isn't a factor of 15 or 25."
It is: 5
10, 15 , 20, 25, 30...
It can be. 10 is a common factor of 50 and 60.
The GCF is 5.
The GCF of 5, 10, 15, and 25 is 5. Since 5 is a factor of each of the other numbers in the set, you know that it's the GCF.
10 and 15 15 and 20 20 and 25
Factors of 5: 1, 5Factors of 10: 1, 2, 5, 10Factors of 15: 1, 3, 5, 15Factors of 25: 1, 5, 25GCF (5, 10, 15, 25) = 5
10, 15, 20, 25 and 30