Jawabanmu

2014-06-06T18:19:57+07:00
KPK dari 12, 20, dan 30 = 2 x 2 x 3 x 5 = 60
2014-06-06T18:20:24+07:00
Faktor Prima
12 = 2²×3
20 = 2²×5
30 = 2×3×5

KPK = 2²×3×5
        = 60
1 5 1