G.C.F

   Today I'm going to teach you greatest common factor.
So let's do the number 416.
the G.C.F. is let's see...
416=2 x 208; 208=2 x 104; 104=2 x 52; 52=2 x 26; 26=2 x 13.
count all of them up now and it's 10.
ssssso bye!