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The Greatest Common Factor (GCF) of 20, 28, and 36 is 4.

The factors of 20 are 1, 2, 4, 5, and 10.

Since ten is not a factor for either 28 or 36, we can remove it from consideration.

Five, likewise, is not a factor for either 28 or 36, so it can be removed as well.

This leaves four, which is the greatest common factor for all three numbers.

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7y ago
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7y ago

The LCM of 20, 28, and 35 is 140

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12y ago

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Q: What is the greatest common factor of 20 28 and 36?
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