Always substitute mentally the definitions in place of the defined.
--- Blaise Pascal
Ex 1: Find LCM of 2, 3 and 4
LCM of 2 and 4 : 4
LCM of 3 and 4 : 3x4= 12 (as no common factor for 3 and 4)
LCM of 2, 3 and 4 = 12
Ex2 : Find LCM of 3, 4, 5 and 6
LCM of 3, 4 and 5 : 3x4x5= 60 (as no common factor for 3, 4 and 5)
60 is divisible by 6.
LCM of 3, 4, 5 and 6 : 60
LCM of 20 and 30 = 2x3x10= 60 ( no common factor for 2 and 3, 10 is common divisor for 20 and 30)
60 is divisible by 12 but not divisible by 25
LCM of 60 and 25 = 60x5 = 300 (as 300 is divisible by 12, 20, 25 and 30 )
Ex3 : Find LCM of 12, 20, 25 and 30
LCM of 20 and 30 = 2x3x10= 60 ( no common factor for 2 and 3, 10 is common divisor for 20 and 30)
60 is divisible by 12 but not divisible by 25
LCM of 60 and 25 = 60x5 = 300 (as 300 is divisible by 12, 20, 25 and 30 )
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