Greatest Common Factor
List all the factors and get the biggest in common

For each integer, build a factor table. As usual, start with the integer and 1, work up through the intergers adding pairs to the table.
Example: What is the GCF of 48 and 54?
 start of factor table for 48right arrow48 factor table with 2right arrow48 factor table with 24right arrow48 factor table with 3right arrow48 factor table with 4right arrowcomplete 48 factor table
Do it for the other integer, too.
 54 factor table
Circle the ones in common. The largest is the GCF.
 48 factor table with circles54 factor table with circles Largest circled factor is 6

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