Least Common Multiple (LCM) of 240 and 420

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To get the Least Common Multiple (LCM) of 240 and 420 we need to factor each value first and then we choose all the factors which appear in any column and multiply them:

240:   222235 
420:   22  357
LCM:   2222357

The Least Common Multiple (LCM) is:   2 x 2 x 2 x 2 x 3 x 5 x 7 = 1680

 

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