kpk dari 50 70 dan 120

50= 2 x 5²
70= 2 x 5 x 7
120= 2³ x 3 x 5

2³ x 3 x 5² x 7
4200

cara 1 =
50 =2 x 5 x 5
70 =2 x 5 x 7
120. =2 x 2 x 2 x 3 x 5
kpk =2 x 2 x 2 x 3 x 5 x 5 x 7
= 8 x 3 x 25 x 7
= 4.200

cara 2 =
50 = 50,100,150,200,250,300,350,400,450,
500,550,600,650,700,750,800,850,900,950,1000,1050,1100,1150,1200,1250,1300,
1350,1400,1450,1500,1550,1600,1650,1700,1750,1800,1850,1900,1950,2000,2050,
2100,2150,2200,2250,2300,2350,2400,2450,2500,2550,2600,2650,2700,2750,2800,2850,2900,2950,3000,3050,3100,3150,3200,3250,3300,3350,3400,3450,3500,3550,3600,3650,3700,3750,3800,3850,3900,3950,4000,4050,4100,4150,4200.

70 =
70,140,210,280,350,420,490,560,630,
700,770,840,910,980,1050,1120,1190,1260,1330,1400,1470,1540,1610,1680,1750,1820,
1890,1960,2030,2100,2170,2240,2310,
2380,2450,2520,2590,2660,2730,2800,2870,2940,3010,3080,3150,3220,3290,
3360,3430,3500,3570,3640,3710,3780,
3850,3920,3990,4060,4130,4200.

120 =
120,240,360,480,600,720,840,960,1080,
1200,1320,1440,1560,1680,1800,1920,
2040,2160,2280,2400,2520,2640,2760,2880,3000,3120,3240,3360,3480,3600,3720,3840,3960,4080,4200.