Greatest Common Factor Review Name ____________________________ Date ________ Period #_________ Factor-­‐a number multiplied to get another number. Greatest Common Factor-­‐the largest factor any two or more numbers have in common. Directions: Write the factors of each number in the Venn diagram. If the two numbers share a factor, write it in the circles where they overlap. Example: 10 12 GCF: 2 4 5 2 3 6 1) 12 15 GCF: ______ 2) 12 18 GCF: ______ 3) 18 24 GCF: ______ 4) 12 30 GCF: ______ 5) 24 36 GCF: ______ 6) 4x 20 GCF: ______ Greatest Common Factor Review 7) 6xy 9x GCF: ______ 9) 36y 45y2 GCF: ______ 8) 7 11 GCF: ______ 10) 32 76 GCF: ______ 

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