What is the LCM for 42 and 56 and 140?

Answer 1

2 x 2 x 7 = 28

2 x 2 x 2 x 5 = 40

2 x 2 x 2 x 2 x 3 x 3 = 144

2 x 2 x 2 x 2 x 3 x 3 x 5 x 7 = 5040, the LCM

Answer 2

Since 58 is a multiple of 28, it is automatically the LCM, but if you insist...

2 x 2 x 7 = 28

2 x 2 x 2 x 7 = 56

2 x 2 x 2 x 7 = 56, the LCM

Answer 3

2 x 2 x 2 x 7 = 56

2 x 2 x 3 x 7 = 84

2 x 2 x 2 x 3 x 7 = 168, the LCM

Answer 4

The LCM is: 840

Answer 5

840

Answer 6

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