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Anonymous
You need at least two numbers to find a GCF.
Wiki User
What is the Greatest common factor of 21 and 84
3 x 23 = 69 3 x 3 x 23 = 207 3 x 23 = 69, the GCF
6.
The Greatest Common Factor (GCF) is: 6
the greatest common factor is 10
It is 2
6
10
3k
3
It is: 4