tentukan kpk dari 90 dan 168

90:2×3×3×5
168:2×2×2×3×7
KPK:2×2×2×3×5×7=840

kok dari 90 & 168
adalah
90 = 90,180,270,360,450,540,630,720,810,900,990,1080,1170,1260,1350,1440,1530,1620,1710,1800,1890,1980,2070,2160,2250,2340,2430,2520,2610,2700,2790,2880,2970,3060,3150,3240,3330,3420,3510,3600
168 = 168,336,504,672,840,1008,1176,1344,1512,1680,1848,2016,2184,2352,2524,2692,2860,3028,3196,3364,3532,3700
karena susah maka tinggal kalikan saja 90×168= 15129