Respuesta :

demolisher
To get the Greates Common Factor (GCF) of 84 and 210 we need to factor each value first and then we choose all the copies of factors and multiply them: 

84:   223 7210:   2 357GCF:   2 3 7

The Greates Common Factor (GCF) is:   2 x 3 x 7 = 42
write the prime factors:-

56 =    2*2*2*7
84 =    2*2*3*7
210 =  2*3*5*7

Pick out the numbers common to all three factors; 
They are 2 and 7.

So the GCF = 2*7  = 14 answer

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