What is the Greatest common factor of 200 240 and 280?

Answer 1

The prime factors of 280 are 2, 2, 2, 5, and 7.

The prime factors of 240 are 2, 2, 2, 2, 3, and 5.

The prime factors of 200 are 2, 2, 2, 5, and 5.

The prime factors they all have in common are 2, 2, 2, and 5, so the greatest common factor is 2 x 2 x 2 x 5 = 40.