The GCF is 135.
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GCF of 18 and 405 is 93
405 Feet = 135 Yards
The Greatest Common Factor of the two numbers is 9. 288/9 = 32, 405/9 = 45.
The factors of 405 are: 1, 3, 5, 9, 15, 27, 45, 81, 135, 405
1, 3, 5, 9, 15, 27, 45, 81, 135, 405 are all factors of 405.