Please Prime Factorize each of the following.

1. 144 2. 2253. 400

Greatest Common Factor12.7.10

Key Terms:

·Common Factor: A whole number that is a common factor of two or more nonzero whole numbers. i.e. 4 is a common factor for 12 and 20

·Greatest Common Factor: The greatest of the common factors.

How do we find the GCF?

St. 1: Prime Factor both numbers.24 32

St. 2: Write out the Prime Factorization of each.

St. 3 Circle and Multiply all the factors in common.

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