anonymous
  • anonymous
I do not understand the greatest common factor . This is what the first question it for 24
Mathematics
  • Stacey Warren - Expert brainly.com
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katieb
  • katieb
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amistre64
  • amistre64
you dont understand what a greatest comon factor is? or what it is for a certain problem??
amistre64
  • amistre64
i suppose one would suggest the other :)
anonymous
  • anonymous
The greatest common factor is the largest positive integer that divides two numbers without a remainder. It is commonly found by either prime factorisation or the Euclidean algorithm, by uncultured cretins and cultured mathematicians, respectively.

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amistre64
  • amistre64
that algorithm ..is that the one subtracted from another and on down the line?
anonymous
  • anonymous
Of course.
anonymous
  • anonymous
yes, ok. so i have to be able to divid then number into correct
anonymous
  • anonymous
Yes. What numbers are you trying to find it for? IF they are > 10000, look up Euclidean algorithm, if not, factorise them.
anonymous
  • anonymous
so then like 24. 12,8,6,4,2 are the factor
anonymous
  • anonymous
Well, they are, but you want the prime factorisation: 24 = 2 * 12 = 2 * 2 * 6 = 2 * 2 * 2 * 3 = 2^3 x 3 It is easier (quicker) to compare numbers this way, though if you found ALL the factors for both, then the highest of them would be the answer, but it's easier to find the prime factorisation and the highest common factor is the part of that which is in both.
anonymous
  • anonymous
my home work is telling me find the gratest common fator and it gives me a example 36: and the answer is writen down 36,18,9, 12,6,4,3,2,1 and 12 this number is underline so that is telling me that is the greates common factor.
anonymous
  • anonymous
How old are you?
anonymous
  • anonymous
If you're young, then you're probably just meant to find all factors and use that. Oh, wait, anyone who does HCF problems is young.
anonymous
  • anonymous
Quicker to go: 24 = 2^3 x 3 36 = 2^2 x 3^2 HCF = 2^2 x 3 = 12, though
anonymous
  • anonymous
I am in 5th . does that mean you can not help me?
anonymous
  • anonymous
so then the answer I gave you 36,18,9,12,6,4,3,2,1, is not correct for 36?
anonymous
  • anonymous
They are all the factors of 36, yes. 12 is the highest factor of both 24 and 36 so is the answer. You can work out the highest common factor of a number that way I just find it tedious)
anonymous
  • anonymous
so sorry. but, that was the way my home work is written. like my next problem is 36 and 9 so my answer will be 18,12,9,6,4,2,1?
anonymous
  • anonymous
I forgot 3 .
anonymous
  • anonymous
so my greatest common factor would be 3?
anonymous
  • anonymous
No, because 9 is a factor of 9 (and 36)
anonymous
  • anonymous
oh, I see I did not think I could use 9 I think I understand. let's try this again. 21 and 28 the common would be 7?
anonymous
  • anonymous
Yes.
anonymous
  • anonymous
Thank you so much for all your help.

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