Best Answer

Let's break 60 and 70 down into their products of prime factors

60 : 2 x 2 x 3 x 5

70 : 2 x 5 x 7

They have the common prime factors 2 and 5, so let's cancel one of them

60 : 2 x 2 x 3 x 5

70 : 2 x 5 x 7

Multiply of the remaining prime factors to get the LCM

2 x 2 x 3 x 5 x 7 = 420

Q: What is the LCM of 60 70?

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The LCM is: 420

The LCM is: 1680

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The LCM of 60 and 70 is 420.

The LCM is: 420

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