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The LCM is: 60

60 is divisible by 30. So, L.C.M. of 30 and 60 is 60.

This can be shown easily by writing down the multiples of 30 and 60:

30: 30, 60, 90, 120,...

60: 60, 120, 180,...

Alternate method:

Method of prime factorization

Prime factorization of 60 = 2x2x3x5

Prime factorization 0f 30 = 2x3x5

L.C.M. = Product of common numbers x Product of uncommon numbers = 2x2x3x5.

So, L.C.M. of 60 and 30 = 60

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14y ago

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