Question

If the LCM of three numbers is 9570 find the HCF

Answer 1

Thanks for the interesting question!

Let us consider three numbers as 9570, 1 and 1.
Therefore, LCM = 9570,  HCF = 1


Now if we consider three numbers as 9570, 9570 and 9570.
Then, LCM = 9570,   HCF = 9570

But in the above-mentioned question, choices have already been given and we are supposed to eliminate values which can not be HCF.

Upon, prime factorization of 9570, we get solution as

9570 = 2*3*5*11*29

And we know that HCF must always be a factor of LCM.
So from the given choices in the question itself, only 11 can be the HCF.

Hence, 11 is the answer.

Hope it helps!

Answer 2

hi I am Roopesh 2007

• given:LCM =9570
• so as we know that the HCF is always a factor of LCM
• so the LCM must be completely divisible by HCF
• here 9570 is completely divisible by 11 only
• therefore 11 is the HCF of three numbers
• I hope that it will help you