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Method of prime factorization is a good method to find GCF.

P.F. of 68 = 2x2x17

P.F. of 56 = 2x2x2x7

It is clear that 2x2 is the greatest common factor.

Therefore, GCF of 68 and 56 = 4.

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โˆ™ 2011-05-02 06:58:01
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โˆ™ 2015-07-26 17:47:40

The GCF is 4.

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Q: What is the greatest common factor of 68 and 56?
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