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To get the Greates Common Factor (GCF) of 2100 and 850 we need to factor each value first and then we choose all the copies of factors and multiply them:
|2100: ||2||2||3||5||5||7|| |
|850: ||2|| || ||5||5|| ||17|
|GCF: ||2|| || ||5||5|| || |
The Greates Common Factor (GCF) is: 2 x 5 x 5 = 50