1 and 7
77 + 84 = 161
84 divided by 8 = 10.5
7. 7x7=49. 7x11=77. 7x12=84.
The greatest common factor of 42, 77 and 84 is 7.
The GCF is 7.
The GCF is 7.
84 - 7 = 77
HCF(21, 77, 84) = 7.
Their factors are: 77: 1, 7, 11, 77 84: 1, 2, 3, 4, 6, 7, 12, 14, 21, 28, 42, 84
GCF(84, 77, 49) = 7.
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