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GCF means Greatest Common Factor.

GCF of 51 and 255 will be, = 255/ 51 = 5.

So, 255 is divisible by 51.

So, the answer is 51.

or,

Factors of 51 is = 17x3

Factors of 255 is = 3x5x17

So the common factors are 3x17 which is 51.

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255 = 51 x 5 so 51 is GCF

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15y ago
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Q: What is the gcf of 51 and 255?
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