# If the product of HCF and LCM of two natural nos is 378000 then which of the following can b their HCF: a) 66 b) 130 c) 34 d) 20

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by tigerslover

do we know at least one of the nos?

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by tigerslover

do we know at least one of the nos?

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LCM = a* b whole divided by HCF

Only when the HCF is 20 we get a proper value for LCM. For the rest of the options the LCMÂ are in decimal form.

Therefore the HCF must be 20 in this case.