15, 30, 45 and 60
7 is not the greatest common factor (GCF) of 15, 30, and 35 because 7 does not evenly divide into all three numbers. The GCF is the largest number that can divide all three numbers without leaving a remainder, and in this case, the GCF is actually 5 since 5 divides evenly into all three numbers.
Since 15 is a factor of 45, it is automatically the GCF.
5,10 15,20 25,30 and many more
The numbers are -6, -5 and -4.
15 + 9 = 24 gcf (15,9) = 3 18 + 6 = 24 gcf(18,6) = 6 6 - 3 = 3
The greatest common factor of the numbers 15 and 11 is 1.
You need at least two numbers to find a GCF.
They are the first three odd prime numbers.
15
1 and 5
3
18
The general rule is that the product of the LCM and the GCF is equal to the product of the original two numbers. That would make the answer 20. Lets overlook the fact that two numbers with a GCF of 15 and an LCM of 20 don't exist.
You need at least two numbers to find a GCF.
There are infinitely many possible answers. The simplest one is probably (5, 10 and 15).
The GCF is 3.