FPB merupakan faktor paling besar dari gabungan beberapa bilangan
Cara mencari FPB
Contoh :
Faktor 18 = {1, 2, 3, 6, 9, 18}
Faktor 24 = {1, 2, 3, 4, 6, 8, 12, 24}
Faktor persekutuan dari 18 dan 24 = { 1, 2, 3, 6}
FPB dari 18 dan 24 = 6
Faktor 75 = {1, 3, 5, 15, 25, 75}
Faktor 120 = {1, 2, 3, 4, 5, 6, 8, 10, 12, 15, 20, 24, 30, 40, 60, 120}
Faktor persekutuan dari 75 dan 120 = {1, 3, 4, 15}
FPB dari 75 dan 120 = 15
Faktor 36 = {1, 2, 3, 4, 6, 9, 12, 18, 36}
Faktor 48 = {1, 2, 3, 4, 6, 8, 12, 16,24, 48}
Faktor 72 = {1, 2, 3, 4, 6, 8, 9, 12, 18, 24, 36, 72}
Faktor persekutuan dari 36 dan 48 = {1, 2, 3, 4, 6, 12}
FPB dari 36 dan 48 = 12
Contoh
| 21 | 35 | |
| 3 | 7 | 5 |
| 5 | 7 | 1 |
| 7 | 1 | 1 |
FPB = 3
| 36 | 54 | |
| 2 | 18 | 27 |
| 2 | 9 | 27 |
| 3 | 3 | 9 |
| 3 | 1 | 3 |
| 3 | 1 | 1 |
FPB = 2 X 3 X 3
= 2 X 32 = 18
| 75 | 105 | 120 | |
| 2 | 75 | 105 | 60 |
| 2 | 75 | 105 | 30 |
| 2 | 75 | 105 | 15 |
| 3 | 25 | 35 | 5 |
| 5 | 5 | 7 | 1 |
| 5 | 1 | 7 | 1 |
| 7 | 1 | 1 | 1 |
FPB = 3 X 5 = 15