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Answer: 4
16 = 2 x 2 x 2 x 2
36 = 2 x 2 x 3 x 3
There are two 2's in each factorization, so the GCF is 2 x 2 = 4
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When factorising find the common factor?
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To work out the greatest common factor, you need two numbers. In this case there is only one number so there is no GCF.
What is the GCF of 7 and 20 please show work?
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Two or more numbers are needed to work out their GCF
