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Mathematics 7 Online
OpenStudy (anonymous):

how do you find the gcf

OpenStudy (anonymous):

You find the greatest number that it divisible by all numbers in the equation.

OpenStudy (anonymous):

so i tried that right ... but i was told to find the GCF of 75,25 i got one but my friend said it was wrong .. help me please.??

OpenStudy (anonymous):

Your just trying to find the gcf of 75 and 25?

OpenStudy (anonymous):

its all one number

OpenStudy (anonymous):

so 7,525

OpenStudy (anonymous):

no there two number

OpenStudy (anonymous):

well then the gcf of 75 and 25 is 5

OpenStudy (anonymous):

thanks :)

OpenStudy (anonymous):

Your welcome.

OpenStudy (asnaseer):

sorry guys, but the gcf (greatest common factor) of 75 and 25 is actually 25.

OpenStudy (anonymous):

Oh yeah asnaseer is right, im sorry!

OpenStudy (asnaseer):

what you do is split each number into its prime factors:\[75=3*5^{2}\]\[25=5^{2}\]you then find the "common" factors between the two - in this case its 5^2 which is 25.

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