Kak fpb dari 190dan220adalah

190
/\
2 95
..../\
...5 19

220
./\
2 110
..../\
..2 55
......./\
......5 11

190 = 2 x 5 x 19
220 = 2^2 x 5 x 11
FPB = 2 x 5 = 10

FPB = 10. Maaf ya kalau salah