D)20 HCF* LCM = a* b where a and b are the numbers
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 LCM are in decimal form.
Therefore the HCF must be 20 in this case.
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ya I know dis 1 bt how can v say dat ans ll b in decimal
kk sorry I got it
what ever
your welcmn
I think the answer will be [d] 20

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