Best Answer

To find the HCF you first have to write the numbers as their prime factors:

36 = 2x2x3x3

75 = 3x5x5

The next step is to identify any common prime factors. In this case both numbers have 3 as a prime factor. Thus the HCF is 3.

To find the LCM you need to multiply the numbers together and divide by the HCF. 36x75/3 = 900

Thus the LCM of 36 and 75 is 900.

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Q: What is the HCF and LCM of 36 and 75?

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6 and 36 12 and 18

HCF is 60 and the LCM is 360

The HCF = 20 The LCM = 600

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