243
If you mean: 1 3 9 27 81 then it is 3*81 = 243
81, 243, 729 The numbers are being multiplied by 3.
-63 and -81
81 then 243
The greatest common factor for the numbers 27 and 81 are 27.
27 times 3 = 81
3-1-.33 repeating
1, 3, 9, 27, 81
1, 3, 9, 27, 81.
1, 3, 9, 27, 81.
1, 3, 9, 27, 81