Well if you look at 81, the factors of 81 are 1,3,9,27, and 81. And the factors of 64 are 1,2,4,8,16,32, and 64. They do not have a single common factor. So the GCF for 81 and 64 would be 1.
'''who else has trouble with math and then gets ridiculed and made fun of by teachers and adults and other, smarter students and then just wants to die?''
