Question

What is the greatest common factor of 200, 120 and 84?

Answer 1

4
Prime factors of 84 = 2^2 . 3 . 7
Prime factors of 120 = 2^3 . 3 . 5
Prime factors of 200 = 2^3 . 5 . 2
Common prime factors: 2
Common prime factors with the lowest exponent: 2^2