How to find HCF and LCM

This video will teach you how to find the highest common factor (HCF) and lowest common multiple (LCM) for 2 and 3 numbers.

Category:

Education

Tags:

• HCF
• Highest
• Common
• Factor
• LCM
• Lowest
• Multiple

[XSliceandDicex]

i swere down u in HCF u times the bottom 2 and 3 :S

[MrYuanMaths]

@XSliceandDicex No you don't. You only multiply the bottom numbers for LCM. Cheers.

[applenick12345]

@MrYuanMaths Really thats not a very good way of doing that if you got high numbers like 458 and 552 that would take u a pretty long time if u did that in a test)))

[MrYuanMaths]

@applenick12345 Firstly, you will not get a test question with such high numbers. It defeats the purpose, it does not test deep understanding at all. It will just be a really bad test question that was setting students up to fail. Plus, do you have a better method? If it was bigger numbers, personally I will use a computer to work it out, not by hand. Cheers.

[veena4435]

hi can you pls do a tutorial abt lcm only??

[MrYuanMaths]

@veena4435 Sure, what would you like to see in it? Any specific examples?

[Prozijie]

Thanks you really help me alot

[CHUTTIVAVA]

thnxxxxxx it helped me alot

[andre8309]

I luv u man it really help

[rhyannab]

this actually really helped me, hopefully i dont get this question wrong in my exam tomorrow! haha..

[CrazySujuFan999]

@TheEpicTechnology you use the next prime number, which is 3, is not then the next prime number, and so on and so forth.

[TheEpicTechnology]

in hcf, what if the numbers were odd?, you cant divide an odd number by 2 can you? please help me !

[TheZee15]

Thank you very much ... its a big help for me to guide my kid in his maths !

[YurisistableMinYul]

Whats the HCF of 78 and 182?? GImme some clue ...

[maratmasry]

@sabourtooth11 i highly suspect it is a Kiwi accent and i simply ADORE it. Oh, yeah I'm showing my son this tut coz he's taking this in school, thanks for shedding some light on this topic!