kpk dan fpb 12,30 dan 42 adalah.......

12 = 2² × 3
30 = 2 × 3 × 5
42 = 2 × 3 × 7

KPK = 2² × 3 × 5 × 7
KPK = 4 × 3 × 35
KPK = 12 × 35
KPK = 420

FPB = 2 × 3
FPB = 6

Maaf Kalau Salah