HCF means highest common factor. LCM means lowest common multiple. If you want to find the HCF of a given number, you should use the method of factorisation and find out all the factors of the given number. Then, you should collect all the common factors and multiply them by the uncommon factors. In this way, you get your HCF. If you want to find out the LCM of a given number, you should use the method of factorisation. Then, you should multiply them with one another. In this way, you can get your LCM.

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HCF = Highest Common Factor and LCM = Lowest Common Multiple of the numbers

To Find HCF

1. Factorize number A and number B.

2. Write their Common factor in another line.

3. Multiply them , and the result achived is the HCF of these two numbers.

notes : Sometimes no factor among the two is common , then there HCF is 1.

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o Find HCF

1. Factorize number A and number B.

2. Write their Common factor in another line.

3. Multiply them , and the result achived is the HCF of these two numbers.

notes : Sometimes no factor among the two is common , then there HCF is 1.

meaning of hcf is highest common factor

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**HCF**of 60 and 72 is 2 × 2 × 3 which is 12. The lowest common multiple is found by multiplying all the factors which appear in either list: So the

**LCM**of 60 and 72 is 2 × 2 × 2 × 3 × 3 × 5 which is 360.

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