What is the Greatest Common Factor of 15 30 40?

Answer 1

The greatest common factor of 15, 30, and 40 is five (5)

Answer: 5

Solution:

15 = 1, 3, 5, 15

30 = 1, 2, 3, 5, 10, 15, 30

40 = 1, 2, 4, 5, 8, 10, 20, 40

Explamation:

For the soultion all those numbers 15, 30, 40 have the number(s) 1 and 5 in common. Since we want the GREATEST common factor (GCF) we want the highest number pssible. So therefore since all numbers have 5 in common and there is no other factor that they ALL have in common the GCF would be 5.