Question

If product of two coprime numbers is 21,then their LCM=__________.​

Answer 1

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21 is the answer.

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⠀⠀${\orange{\bold{\text{Reason}}}}$

• It is given that the numbers are coprime. It means that their HCF is 1.So, there are no any common factors of them other than one. So on multiplying all the factors will be its LCM. And on multiplying all the factors we get the product of the numbers which are given. And the product is given 21. So, the LCM is 21.

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Hope it helps