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To get the Greates Common Factor (GCF) of 345 and 546 we need to factor each value first and then we choose all the copies of factors and multiply them:
|345: || ||3||5|| || ||23|
|546: ||2||3|| ||7||13|| |
|GCF: || ||3|| || || || |
The Greates Common Factor (GCF) is: 3