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Best Answer

Factors of 6 are 1, 2, 3 and 6.

Factors of 40 are 1, 2, 4, 5, 8, 10, 20 and 40.

Common factors are 1 and 2. Therefore, the greatest common factors(gcf) is 2.

Alternate method:

The method used above is not useful for finding GCF of larger numbers.

However, the method of prime factorization is very useful and simple for finding GCF.

Prime factorization of 6 = 2x3

Prime factorization of 40 = 2x2x2x5

It is clear from the factorization of both numbers that 2 is the GCF.

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Wiki User

13y ago

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Wiki User

11y ago

The GCF of 40, 36 and 16 is 4. A trick here is noticing that 4 is the gap between 40 and 36, so that would be the max. GCF. This divides nicely into each, giving 10, 9 and 4 respectively.

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Wiki User

9y ago

The GCF is 4.

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Wiki User

12y ago

The GCF is 6.

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Wiki User

9y ago

The GCF is 4.

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Wiki User

14y ago

GCF of 40 and 36 is 4.

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Wiki User

11y ago

4 is.

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Q: What is the GCF of 6 and 40?
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