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Question

Can two numbers have 15 as their HCF and 175 as their LACK? Give reasons.

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Solution

For 2 or more numbers,

LCM=Product of highest power of each factor involved in the numbers.

HCF=Product of smallest power of each common factor.

∴We can conclude that LCM is always a multiple of HCF, i.e.,

LCM = k × HCF

We are given that

LCM = 175

HCF = 15

But in this case, LCM ≠ k × HCF.

Therefore, 2 numbers can't have LCM as 175 and HCF as 15.


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