0
Anonymous
It is 3
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The GCF is 3.
36 - 21 = 1536 - 21 = 1536 - 21 = 1536 - 21 = 15
51
The gcf of 6, 15, and 21 is 3. But once you throw that 19 in there, it's ' 1 '.
3. Ayo!