Respuesta :

the greatest common factor of 10 and 15 is 5 :

first list the factors of 10 and 15

10: 1,2,5,10
15 : 1,3,5,15

the factors they have in common is 1 and 5, 5 is greater than 1 so 5 is the greatest common factor of 10 and 15

hope this helped

Blugamer2211
the greatest common factor of 10 and 15 is 5 

  1, 2, 5, 10 (for ten)
  1, 3, 5, 15 (for 15)

the greatest common factor is when you find the common factor but the one that is greatest when you see 5 and 5 you instantly know that that is the gcf (for 10 & 15)

I hope this helps :D