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To find the LCM you first have to break the numbers into their prime factors:

60 = 2x2x3x5

100 = 2x2x5x5

The next step is to identify the HCF. In this case it's 2x2x5 = 20. Finally, you multiply the numbers together and divide by the HCF:

60x100/20 = 300

Therefore the LCM of 60 and 100 is 300.

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13y ago

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