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To find the greatest common factor of two numbers, they first need to be split into their prime factors. For 85 and 51 this is done as follows:

51 = 17x3

85 = 17x5

The next step is to identify any common factors. In this case, both numbers have 17 as a prime factor. This is the only common factor, and thus the greatest common factor of 85 and 51 is 17.

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โˆ™ 2011-09-25 19:41:26
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Q: What is the greatest common factor of 85 and 51?
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