- What is the gcf of 20 30 and 40?

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What is the greatest common factor of 186 248 and 372? What is the greatest common factor of 37 and 47? What is the greatest common factor of 56 154 and 168? What is a fraction in which the greatest common factor of the numerator and the denominator is 1 is written in what? What is the least common multiple of 68 and 2?