The GCF ( greatest common factor) is 2 I know for a fact this is the correct answer
Greatest common factor means the factor that goes (for example) 18 and 20, but the biggest.
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Oh, dude, the Greatest Common Factor (GCF) of 20, 18, and 14 is 2. It's like the cool kid that can divide all three of them without any remainders. So, yeah, 2 is the GCF here.
Prime factor each one then circle the common factors. Multiply those and you'll have the GCF.
18=2x3x3
20=2x2x5
2 is the GCF
The factors of 18 are:
1, 2, 3, 6, 9, 18
The factors of 20 are:
1, 2, 4, 5, 10, 20
The Greatest Common Factor (GCF) is:
2