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00:00Today I will tell you what is the most stormy way to take out the LCM.
00:03You have to take out the LCM of 21-35-42.
00:06The biggest number is 42.
00:07Assume this to be the LCM.
00:08Now it is near 35.
00:09Does it divide 35-42?
00:11No, it doesn't.
00:12Why? Because 5 comes in 35.
00:13It is dividing 7-42.
00:15That means I need 5 more.
00:17Multiply by 5.
00:1721.
00:18Does 21-42 divide 5?
00:20Yes, it does.
00:2042 is divided by 2.
00:21That means 42-5 is 210.
00:23This is the LCM.
00:24I have to take out this LCM.
00:25The biggest number is 77.
00:27I have taken 77 as the LCM.
00:28Does 11-77 divide?
00:30Yes, it does.
00:31Does 44-77 divide?
00:33No, it doesn't.
00:33Because 4 comes in 44.
00:354 times 11 is 11.
00:3611 is already dividing 77.
00:374 is left.
00:38So I have to multiply by 4 more.
00:40So this is 308.
00:42In the same way, same to same.
00:43Take out the LCM of these 3 numbers and tell me.
00:45If you like the trick, then press the like button.