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The greatest common factor (GCF) of two (or more) numbers is the greatest factor that divides two numbers. To find the GCF you must work out and list the prime factors of each of the numbers. You will see that the numbers have prime factors in common. Multiply those factors the numbers have in common together and this gives you the GCF for the numbers.

eg Number A = 18, Prime factors = 2*3*3

Number B = 24, Prime factors = 2*2*2*3

The Prime factors that A and B have in common are 2 and 3

Multiply them together = 6

6= the GCF of 18 and 24

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8y ago

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More answers

That's called the greatest common factor, or GCF.

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Wiki User

12y ago
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That's the greatest common factor, or GCF.

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Wiki User

9y ago
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That's the greatest common factor, or GCF.

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Wiki User

8y ago
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That is called the "greatest common factor" or the "greatest common divisor".

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Wiki User

10y ago
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It is their greatest common factor.

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Wiki User

8y ago
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ion know

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Brandon Davis

Lvl 3
4y ago
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Q: What is the largest factor that two numbers share is called?
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