The GCF is 6.
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The greatest common factor (GCF) of 180 and 450 is the largest number that divides both 180 and 450 without leaving a remainder. To find the GCF, you can list the factors of each number and identify the largest factor they have in common. The factors of 180 are 1, 2, 3, 4, 5, 6, 9, 10, 12, 15, 18, 20, 30, 36, 45, 60, 90, and 180. The factors of 450 are 1, 2, 3, 5, 6, 9, 10, 15, 18, 25, 30, 45, 50, 75, 90, 150, and 450. The GCF of 180 and 450 is 90.
2 x 2 x 2 x 3 x 7 = 168 2 x 2 x 3 x 3 x 5 = 180 2 x 3 x 3 x 5 x 5 = 450 2 x 3 = 6, the GCF
The GCF is 4.
A set of even numbers cannot be relatively prime. They are all divisible by 2.
2 x 2 x 2 x 3 x 7 = 168 2 x 2 x 3 x 3 x 5 = 180 2 x 3 x 3 x 5 x 5 = 450