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To get the Greates Common Factor (GCF) of 1009 and 200 we need to factor each value first and then we choose all the copies of factors and multiply them:
|1009: || || || || || ||1009|
|200: ||2||2||2||5||5|| |
|GCF: || || || || || || |
The Greates Common Factor (GCF) is: 1