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To find the GCF of two numbers, you first need to break them down into their prime factors. For 140 and 252, these are:

140 = 2x2x5x7

252 = 2x2x3x3x7

The next step is to identify common prime factors. In this case, both numbers have two 2s and a 7 in their prime factors. To find the GCF, we simply multiply these common prime factors together:

2x2x7 = 28.

Thus the greatest common factor of 140 and 252 is 28.

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βˆ™ 2011-09-25 19:36:03
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Q: What is the greatest common factor of 140 and 252?
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