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pinoman008 2018-10-24 11:21 PM

LCM & HCF

The H.C.F. of x and y is x. What is the L.C.M. of x and y?
a) x
b) y
c) x + y
d) y - x


Thank you

halola 2018-10-25 09:20 AM

[quote]原帖由 [i]pinoman008[/i] 於 2018-10-24 11:21 PM 發表 [url=https://www.discuss.com.hk/redirect.php?goto=findpost&pid=489469845&ptid=27804374][img]https://www.discuss.com.hk/images/common/back.gif[/img][/url]
The H.C.F. of x and y is x. What is the L.C.M. of x and y?
a) x
b) y
c) x + y
d) y - x


Thank you [/quote]


b)

bifocal08 2018-10-27 04:17 PM

x&y HCF係x
即是y係x嘅倍數, 並且y>x
x同y嘅公倍數一定唔會細過x或者y
即係佢哋個LCM一定係大過或者等於y
y係x嘅倍數,亦係自己嘅倍數
所以佢哋LCM係y
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