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The HCF of two numbers is 7 and their LCM is 84 . If one of the numbers is 21 then find the other number.


Safeer PP 13th Dec, 2021
Answer (1)
Safeer PP 13th Dec, 2021

Let the other number be a.

We know that,

(HCF of the two numbers) x (LCM of the two numbers)= Product of Two numbers

Now, 7×84=21×a

588=21a

Which on dividing both sides by 21 ,

We get, a=28

The other number is 28 .

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