21=1x3x7

75=1x3x5x5

LCM=1x3x5x5x7=525

The LCM is: 105

The LCM of 21 & 30 is... 210

For 21, 63 and 167 the LCM is: 10,521

21 = 3*7 56 = 23*7 LCM = 23 * 3 * 7 = 168

42

The LCM is 75.

LCM of 25 and 75 is 75.

The LCM of 15 and 75 is 75.

lcm(4, 10) = 20 lcm(25, 75) = 75 lcm(4, 10, 25, 75) = 300

The LCM is 150.

The LCM is 675.

The LCM is 600.