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March 30, 2015

March 30, 2015

Posted by **Brandi** on Wednesday, August 8, 2012 at 6:40pm.

- Math -
**MathMate**, Wednesday, August 8, 2012 at 10:39pm21 is correct.

When in doubt, do one of the following:

1. Find GCF for two numbers at a time, the first time using two original numbers. The second time use the first GCF and the third number.

2. Divide each original number by the GCF found. If the numbers don't divide, there is a mistake. If there is a GCF between the three GCFs, then some factors were missing from the original GCF.

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